Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - ext4：在 ext4_mb_clear_bb（） 中使用之前必须验证区块范围 使用 ext4_inode_block_valid（） 在 ext4_free_blocks（） 中验证要释放的区块范围，然后将其传递给 ext4_mb_clear_bb（）。但是，在 bigalloc 文件系统上的某些情况下，该范围可能会在 ext4_free_blocks（） 中的验证之后进行调整，这可能在损坏的文件系统上导致问题，例如 syzkaller 发现的导致以下缺陷：fs/ext4/ext4.h：3319！抢占 SMP NOPTI CPU：28 PID：4243 通信：重现 Kdump：已加载 未受感染 5.19.0-rc6+ #1 硬件名称：QEMU Standard PC （Q35 + ICH9， 2009）， BIOS 1.15.0-1.fc35 04/01/2014 RIP： 0010：ext4_free_blocks+0x95e/0xa90 调用跟踪： <TASK> ？ lock_timer_base+0x61/0x80 ？ __es_remove_extent+0x5a/0x760 ？ __mod_timer+0x256/0x380 ？ ext4_ind_truncate_ensure_credits+0x90/0x220 ext4_clear_blocks+0x107/0x1b0 ext4_free_data+0x15b/0x170 ext4_ind_truncate+0x214/0x2c0 ？ _raw_spin_unlock+0x15/0x30 ？ext4_discard_preallocations+0x15a/0x410 ？ext4_journal_check_start+0xe/0x90 ？__ext4_journal_start_sb+0x2f/0x110 ext4_truncate+0x1b5/0x460 ？
    __ext4_journal_start_sb+0x2f/0x110 ext4_evict_inode+0x2b4/0x6f0驱逐+0xd0/0x1d0 ext4_enable_quotas+0x11f/0x1f0 ext4_orphan_cleanup+0x3de/0x430 ？proc_create_seq_private+0x43/0x50 ext4_fill_super+0x295f/0x3ae0 ？snprintf+0x39/0x40 ？sget_fc+0x19c/0x330 ？ext4_reconfigure+0x850/0x850 get_tree_bdev+0x16d/0x260 vfs_get_tree+0x25/0xb0 path_mount+0x431/0xa70 __x64_sys_mount+0xe2/0x120 do_syscall_64+0x5b/0x80 ？do_user_addr_fault+0x1e2/0x670 ？exc_page_fault+0x70/0x170 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP：0033：0x7fdf4e512ace 通过确保每次在 ext4_free_blocks（） 或 ext4_mb_clear_bb（） 中更改区块范围之前正确验证该区块范围来修复该问题。
    (CVE-2022-50021)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

CentOS Linux 8.4 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS8.4：CLSA-2026：U 1783414634公告中提及的多个漏洞的影响。

  - 已修复 Linux 内核中的下列漏洞：KVM: x86/mmu: Don't advance iterator after restart due to yielding After dropping mmu_lock in the TDP MMU, restart the iterator during tdp_iter_next() and do not advance the iterator. Advancing the iterator results in skipping the top-level SPTE and all its children, which is fatal if any of the skipped SPTEs were not visited before yielding.
    When zapping all SPTEs, i.e. when min_level == root_level, restarting the iter and then invoking tdp_iter_next() is always fatal if the current gfn has as a valid SPTE, as advancing the iterator results in try_step_side() skipping the current gfn, which wasn't visited before yielding. Sprinkle WARNs on iter->yielded being true in various helpers that are often used in conjunction with yielding, and tag the helper with __must_check to reduce the probabily of improper usage. Failing to zap a top-level SPTE manifests in one of two ways. If a valid SPTE is skipped by both kvm_tdp_mmu_zap_all() and kvm_tdp_mmu_put_root(), the shadow page will be leaked and KVM will WARN accordingly. WARNING: CPU: 1 PID:
    3509 at arch/x86/kvm/mmu/tdp_mmu.c:46 [kvm] RIP: 0010:kvm_mmu_uninit_tdp_mmu+0x3e/0x50 [kvm] Call Trace:
    <TASK> kvm_arch_destroy_vm+0x130/0x1b0 [kvm] kvm_destroy_vm+0x162/0x2a0 [kvm] kvm_vcpu_release+0x34/0x60 [kvm] __fput+0x82/0x240 task_work_run+0x5c/0x90 do_exit+0x364/0xa10 ? futex_unqueue+0x38/0x60 do_group_exit+0x33/0xa0 get_signal+0x155/0x850 arch_do_signal_or_restart+0xed/0x750 exit_to_user_mode_prepare+0xc5/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x48/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae If kvm_tdp_mmu_zap_all() skips a gfn/SPTE but that SPTE is then zapped by kvm_tdp_mmu_put_root(), KVM triggers a use-after-free in the form of marking a struct page as dirty/accessed after it has been put back on the free list. This directly triggers a WARN due to encountering a page with page_count() == 0, but it can also lead to data corruption and additional errors in the kernel. WARNING: CPU: 7 PID: 1995658 at arch/x86/kvm/../../../virt/kvm/kvm_main.c:171 RIP:
    0010:kvm_is_zone_device_pfn.part.0+0x9e/0xd0 [kvm] Call Trace: <TASK> kvm_set_pfn_dirty+0x120/0x1d0 [kvm]
    __handle_changed_spte+0x92e/0xca0 [kvm] __handle_changed_spte+0x63c/0xca0 [kvm]
    __handle_changed_spte+0x63c/0xca0 [kvm] __handle_changed_spte+0x63c/0xca0 [kvm] zap_gfn_range+0x549/0x620 [kvm] kvm_tdp_mmu_put_root+0x1b6/0x270 [kvm] mmu_free_root_page+0x219/0x2c0 [kvm] kvm_mmu_free_roots+0x1b4/0x4e0 [kvm] kvm_mmu_unload+0x1c/0xa0 [kvm] kvm_arch_destroy_vm+0x1f2/0x5c0 [kvm] kvm_put_kvm+0x3b1/0x8b0 [kvm] kvm_vcpu_release+0x4e/0x70 [kvm] __fput+0x1f7/0x8c0 task_work_run+0xf8/0x1a0 do_exit+0x97b/0x2230 do_group_exit+0xda/0x2a0 get_signal+0x3be/0x1e50 arch_do_signal_or_restart+0x244/0x17f0 exit_to_user_mode_prepare+0xcb/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x4d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Note, the underlying bug existed even before commit 1af4a96025b3 (KVM: x86/mmu: Yield in TDU MMU iter even if no SPTES changed) moved calls to tdp_mmu_iter_cond_resched() to the beginning of loops, as KVM could still incorrectly advance past a top-level entry when yielding on a lower-level entry. But with respect to leaking shadow pages, the bug was introduced by yielding before processing the current gfn. Alternatively, tdp_mmu_iter_cond_resched() could simply fall through, or callers could jump to their retry label. The downside of that approach is that tdp_mmu_iter_cond_resched() _must_ be called before anything else in the loop, and there's no easy way to enfornce that requirement. Ideally, KVM would handling the cond_resched() fully within the iterator macro (the code is actually quite clean) and avoid this entire class of bugs, but that is extremely difficult do wh ---truncated--- (CVE-2021-47094)

  - 已修复 Linux 内核中的下列漏洞：net: bridge: fix vlan tunnel dst refcnt when egressing The egress tunnel code uses dst_clone() and directly sets the result which is wrong because the entry might have 0 refcnt or be already deleted, causing number of problems. It also triggers the WARN_ON() in dst_hold()[1] when a refcnt couldn't be taken. Fix it by using dst_hold_safe() and checking if a reference was actually taken before setting the dst. [1] dmesg WARN_ON log and following refcnt errors WARNING: CPU: 5 PID: 38 at include/net/dst.h:230 br_handle_egress_vlan_tunnel+0x10b/0x134 [bridge] Modules linked in: 8021q garp mrp bridge stp llc bonding ipv6 virtio_net CPU: 5 PID: 38 Comm:
    ksoftirqd/5 Kdump: loaded Tainted: G W 5.13.0-rc3+ #360 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 RIP: 0010:br_handle_egress_vlan_tunnel+0x10b/0x134 [bridge] Code: e8 85 bc 01 e1 45 84 f6 74 90 45 31 f6 85 db 48 c7 c7 a0 02 19 a0 41 0f 94 c6 31 c9 31 d2 44 89 f6 e8 64 bc 01 e1 85 db 75 02 <0f> 0b 31 c9 31 d2 44 89 f6 48 c7 c7 70 02 19 a0 e8 4b bc 01 e1 49 RSP:
    0018:ffff8881003d39e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffffa01902a0 RBP: ffff8881040c6700 R08:
    0000000000000000 R09: 0000000000000001 R10: 2ce93d0054fe0d00 R11: 54fe0d00000e0000 R12: ffff888109515000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000401 FS: 0000000000000000(0000) GS:ffff88822bf40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2:
    00007f42ba70f030 CR3: 0000000109926000 CR4: 00000000000006e0 Call Trace: br_handle_vlan+0xbc/0xca [bridge]
    __br_forward+0x23/0x164 [bridge] deliver_clone+0x41/0x48 [bridge] br_handle_frame_finish+0x36f/0x3aa [bridge] ? skb_dst+0x2e/0x38 [bridge] ? br_handle_ingress_vlan_tunnel+0x3e/0x1c8 [bridge] ? br_handle_frame_finish+0x3aa/0x3aa [bridge] br_handle_frame+0x2c3/0x377 [bridge] ? __skb_pull+0x33/0x51 ? vlan_do_receive+0x4f/0x36a ? br_handle_frame_finish+0x3aa/0x3aa [bridge]
    __netif_receive_skb_core+0x539/0x7c6 ? __list_del_entry_valid+0x16e/0x1c2
    __netif_receive_skb_list_core+0x6d/0xd6 netif_receive_skb_list_internal+0x1d9/0x1fa gro_normal_list+0x22/0x3e dev_gro_receive+0x55b/0x600 ? detach_buf_split+0x58/0x140 napi_gro_receive+0x94/0x12e virtnet_poll+0x15d/0x315 [virtio_net] __napi_poll+0x2c/0x1c9 net_rx_action+0xe6/0x1fb __do_softirq+0x115/0x2d8 run_ksoftirqd+0x18/0x20 smpboot_thread_fn+0x183/0x19c ? smpboot_unregister_percpu_thread+0x66/0x66 kthread+0x10a/0x10f ? kthread_mod_delayed_work+0xb6/0xb6 ret_from_fork+0x22/0x30 ---[ end trace 49f61b07f775fd2b ]--- dst_release: dst:00000000c02d677a refcnt:-1 dst_release underflow (CVE-2021-47222)

  - 已修复 Linux 内核中的下列漏洞：IB/mlx5: Fix initializing CQ fragments buffer The function init_cq_frag_buf() can be called to initialize the current CQ fragments buffer cq->buf, or the temporary cq->resize_buf that is filled during CQ resize operation. However, the offending commit started to use function get_cqe() for getting the CQEs, the issue with this change is that get_cqe() always returns CQEs from cq->buf, which leads us to initialize the wrong buffer, and in case of enlarging the CQ we try to access elements beyond the size of the current cq->buf and eventually hit a kernel panic. [exception RIP: init_cq_frag_buf+103] [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib] [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core] [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt] [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt] [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt] [ffff9f799ddcbec8] kthread at ffffffffa66c5da1 [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd Fix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that takes the correct source buffer as a parameter. (CVE-2021-47261)

  - 已修复 Linux 内核中的下列漏洞：blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd KASAN reports a use-after-free report when doing fuzz test: [693354.104835] ================================================================== [693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160 [693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338 [693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147 [693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018 [693354.105612] Call Trace: [693354.105621] dump_stack+0xf1/0x19b [693354.105626] ? show_regs_print_info+0x5/0x5 [693354.105634] ? printk+0x9c/0xc3 [693354.105638] ? cpumask_weight+0x1f/0x1f [693354.105648] print_address_description+0x70/0x360 [693354.105654] kasan_report+0x1b2/0x330 [693354.105659] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105665] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105670] bfq_io_set_weight_legacy+0xd3/0x160 [693354.105675] ? bfq_cpd_init+0x20/0x20 [693354.105683] cgroup_file_write+0x3aa/0x510 [693354.105693] ? ___slab_alloc+0x507/0x540 [693354.105698] ? cgroup_file_poll+0x60/0x60 [693354.105702] ? 0xffffffff89600000 [693354.105708] ? usercopy_abort+0x90/0x90 [693354.105716] ? mutex_lock+0xef/0x180 [693354.105726] kernfs_fop_write+0x1ab/0x280 [693354.105732] ? cgroup_file_poll+0x60/0x60 [693354.105738] vfs_write+0xe7/0x230 [693354.105744] ksys_write+0xb0/0x140 [693354.105749] ? __ia32_sys_read+0x50/0x50 [693354.105760] do_syscall_64+0x112/0x370 [693354.105766] ? syscall_return_slowpath+0x260/0x260 [693354.105772] ? do_page_fault+0x9b/0x270 [693354.105779] ? prepare_exit_to_usermode+0xf9/0x1a0 [693354.105784] ? enter_from_user_mode+0x30/0x30 [693354.105793] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.105875] Allocated by task 1453337: [693354.106001] kasan_kmalloc+0xa0/0xd0 [693354.106006] kmem_cache_alloc_node_trace+0x108/0x220 [693354.106010] bfq_pd_alloc+0x96/0x120 [693354.106015] blkcg_activate_policy+0x1b7/0x2b0 [693354.106020] bfq_create_group_hierarchy+0x1e/0x80 [693354.106026] bfq_init_queue+0x678/0x8c0 [693354.106031] blk_mq_init_sched+0x1f8/0x460 [693354.106037] elevator_switch_mq+0xe1/0x240 [693354.106041] elevator_switch+0x25/0x40 [693354.106045] elv_iosched_store+0x1a1/0x230 [693354.106049] queue_attr_store+0x78/0xb0 [693354.106053] kernfs_fop_write+0x1ab/0x280 [693354.106056] vfs_write+0xe7/0x230 [693354.106060] ksys_write+0xb0/0x140 [693354.106064] do_syscall_64+0x112/0x370 [693354.106069] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106114] Freed by task 1453336:
    [693354.106225] __kasan_slab_free+0x130/0x180 [693354.106229] kfree+0x90/0x1b0 [693354.106233] blkcg_deactivate_policy+0x12c/0x220 [693354.106238] bfq_exit_queue+0xf5/0x110 [693354.106241] blk_mq_exit_sched+0x104/0x130 [693354.106245] __elevator_exit+0x45/0x60 [693354.106249] elevator_switch_mq+0xd6/0x240 [693354.106253] elevator_switch+0x25/0x40 [693354.106257] elv_iosched_store+0x1a1/0x230 [693354.106261] queue_attr_store+0x78/0xb0 [693354.106264] kernfs_fop_write+0x1ab/0x280 [693354.106268] vfs_write+0xe7/0x230 [693354.106271] ksys_write+0xb0/0x140 [693354.106275] do_syscall_64+0x112/0x370 [693354.106280] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106329] The buggy address belongs to the object at ffff888be0a35580 which belongs to the cache kmalloc-1k of size 1024 [693354.106736] The buggy address is located 228 bytes inside of 1024-byte region [ffff888be0a35580, ffff888be0a35980) [693354.107114] The buggy address belongs to the page:
    [693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0 [693354.107606] flags: 0x17ffffc0008100(slab|head) [693354.107760] raw:
    0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080 [693354.108020] r ---truncated--- (CVE-2021-47379)

  - 已修复 Linux 内核中的下列漏洞：ext4: block range must be validated before use in ext4_mb_clear_bb() Block range to free is validated in ext4_free_blocks() using ext4_inode_block_valid() and then it's passed to ext4_mb_clear_bb(). However in some situations on bigalloc file system the range might be adjusted after the validation in ext4_free_blocks() which can lead to troubles on corrupted file systems such as one found by syzkaller that resulted in the following BUG kernel BUG at fs/ext4/ext4.h:3319! PREEMPT SMP NOPTI CPU: 28 PID: 4243 Comm: repro Kdump: loaded Not tainted 5.19.0-rc6+ #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1.fc35 04/01/2014 RIP: 0010:ext4_free_blocks+0x95e/0xa90 Call Trace: <TASK> ? lock_timer_base+0x61/0x80 ?
    __es_remove_extent+0x5a/0x760 ? __mod_timer+0x256/0x380 ? ext4_ind_truncate_ensure_credits+0x90/0x220 ext4_clear_blocks+0x107/0x1b0 ext4_free_data+0x15b/0x170 ext4_ind_truncate+0x214/0x2c0 ?
    _raw_spin_unlock+0x15/0x30 ? ext4_discard_preallocations+0x15a/0x410 ? ext4_journal_check_start+0xe/0x90 ?
    __ext4_journal_start_sb+0x2f/0x110 ext4_truncate+0x1b5/0x460 ? __ext4_journal_start_sb+0x2f/0x110 ext4_evict_inode+0x2b4/0x6f0 evict+0xd0/0x1d0 ext4_enable_quotas+0x11f/0x1f0 ext4_orphan_cleanup+0x3de/0x430 ? proc_create_seq_private+0x43/0x50 ext4_fill_super+0x295f/0x3ae0 ? snprintf+0x39/0x40 ? sget_fc+0x19c/0x330 ? ext4_reconfigure+0x850/0x850 get_tree_bdev+0x16d/0x260 vfs_get_tree+0x25/0xb0 path_mount+0x431/0xa70 __x64_sys_mount+0xe2/0x120 do_syscall_64+0x5b/0x80 ? do_user_addr_fault+0x1e2/0x670 ? exc_page_fault+0x70/0x170 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP:
    0033:0x7fdf4e512ace Fix it by making sure that the block range is properly validated before used every time it changes in ext4_free_blocks() or ext4_mb_clear_bb(). (CVE-2022-50021)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

CentOS Linux 8 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS-STREAM8：CLSA-2026：1783790425 公告中提及的多个漏洞的影响。

  - netfilter 中存在的一个缺陷可允许联网攻击者推断 openvpn 连接端点信息，从而进一步使用这些信息发动传统网络攻击。(CVE-2021-3773)

  - 在代理虚拟化 TPM 设备的 Linux 内核实现中发现一个缺陷。在配置了虚拟化 TPM 设备（并非默认配置）的系统上，本地攻击者可以造成释放后使用错误，并且可能会提升系统权限。(CVE-2022-2977)

  - 已修复 Linux 内核中的下列漏洞：tracing: Free buffers when a used dynamic event is removed After 65536 dynamic events have been added and removed, the type field of the event then uses the first type number that is available (not currently used by other events). A type number is the identifier of the binary blobs in the tracing ring buffer (known as events) to map them to logic that can parse the binary blob. The issue is that if a dynamic event (like a kprobe event) is traced and is in the ring buffer, and then that event is removed (because it is dynamic, which means it can be created and destroyed), if another dynamic event is created that has the same number that new event's logic on parsing the binary blob will be used. To show how this can be an issue, the following can crash the kernel: # cd /sys/kernel/tracing # for i in `seq 65536`; do echo 'p:kprobes/foo do_sys_openat2 $arg1:u32' > kprobe_events # done For every iteration of the above, the writing to the kprobe_events will remove the old event and create a new one (with the same format) and increase the type number to the next available on until the type number reaches over 65535 which is the max number for the 16 bit type. After it reaches that number, the logic to allocate a new number simply looks for the next available number.
    When an dynamic event is removed, that number is then available to be reused by the next dynamic event created. That is, once the above reaches the max number, the number assigned to the event in that loop will remain the same. Now that means deleting one dynamic event and created another will reuse the previous events type number. This is where bad things can happen. After the above loop finishes, the kprobes/foo event which reads the do_sys_openat2 function call's first parameter as an integer. # echo 1 > kprobes/foo/enable # cat /etc/passwd > /dev/null # cat trace cat-2211 [005] .... 2007.849603: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849620: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849838: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849880: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 # echo 0 > kprobes/foo/enable Now if we delete the kprobe and create a new one that reads a string: # echo 'p:kprobes/foo do_sys_openat2 +0($arg2):string' > kprobe_events And now we can the trace: # cat trace sendmail-1942 [002] ..... 530.136320: foo:
    (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.930817: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.930961: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.934278: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.934563: foo: (do_sys_openat2+0x0/0x240) arg1= ---truncated--- (CVE-2022-49006)

  - 已修复 Linux 内核中的下列漏洞：tracing: Fix wild-memory-access in register_synth_event() In register_synth_event(), if set_synth_event_print_fmt() failed, then both trace_remove_event_call() and unregister_trace_event() will be called, which means the trace_event_call will call __unregister_trace_event() twice. As the result, the second unregister will causes the wild-memory-access. register_synth_event set_synth_event_print_fmt failed trace_remove_event_call event_remove if call->event.funcs then __unregister_trace_event (first call) unregister_trace_event
    __unregister_trace_event (second call) Fix the bug by avoiding to call the second
    __unregister_trace_event() by checking if the first one is called. general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] CPU: 0 PID: 3807 Comm: modprobe Not tainted 6.1.0-rc1-00186-g76f33a7eedb4 #299 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 RIP: 0010:unregister_trace_event+0x6e/0x280 Code:
    00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 0e 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 08 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 01 00 00 49 89 2c 24 48 85 ed 74 28 e8 7a 9b RSP:
    0018:ffff88810413f370 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffff888105d050b0 RCX: 0000000000000000 RDX: 1bd5a00000000024 RSI: ffff888119e276e0 RDI: ffffffff835a8b20 RBP: dead000000000100 R08:
    0000000000000000 R09: fffffbfff0913481 R10: ffffffff8489a407 R11: fffffbfff0913480 R12: dead000000000122 R13: ffff888105d050b8 R14: 0000000000000000 R15: ffff888105d05028 FS: 00007f7823e8d540(0000) GS:ffff888119e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2:
    00007f7823e7ebec CR3: 000000010a058002 CR4: 0000000000330ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK>
    __create_synth_event+0x1e37/0x1eb0 create_or_delete_synth_event+0x110/0x250 synth_event_run_command+0x2f/0x110 test_gen_synth_cmd+0x170/0x2eb [synth_event_gen_test] synth_event_gen_test_init+0x76/0x9bc [synth_event_gen_test] do_one_initcall+0xdb/0x480 do_init_module+0x1cf/0x680 load_module+0x6a50/0x70a0 __do_sys_finit_module+0x12f/0x1c0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd (CVE-2022-49799)

  - 已修复 Linux 内核中的下列漏洞：ata: libata-transport: fix double ata_host_put() in ata_tport_add() In the error path in ata_tport_add(), when calling put_device(), ata_tport_release() is called, it will put the refcount of 'ap->host'. And then ata_host_put() is called again, the refcount is decreased to 0, ata_host_release() is called, all ports are freed and set to null.
    When unbinding the device after failure, ata_host_stop() is called to release the resources, it leads a null-ptr-deref(), because all the ports all freed and null. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 CPU: 7 PID: 18671 Comm: modprobe Kdump: loaded Tainted: G E 6.1.0-rc3+ #8 pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc :
    ata_host_stop+0x3c/0x84 [libata] lr : release_nodes+0x64/0xd0 Call trace: ata_host_stop+0x3c/0x84 [libata] release_nodes+0x64/0xd0 devres_release_all+0xbc/0x1b0 device_unbind_cleanup+0x20/0x70 really_probe+0x158/0x320 __driver_probe_device+0x84/0x120 driver_probe_device+0x44/0x120
    __driver_attach+0xb4/0x220 bus_for_each_dev+0x78/0xdc driver_attach+0x2c/0x40 bus_add_driver+0x184/0x240 driver_register+0x80/0x13c __pci_register_driver+0x4c/0x60 ahci_pci_driver_init+0x30/0x1000 [ahci] Fix this by removing redundant ata_host_put() in the error path. (CVE-2022-49826)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

如 TuxCare CENTOS7：CLSA-2026：1782148320公告所述，CentOS Linux 7 主机上存在安装的程序包，该漏洞会受到多个漏洞的影响。

  - 已修复 Linux 内核中的下列漏洞：media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf() Fix an 11-year old bug in ngene_command_config_free_buf() while addressing the following warnings caught with -Warray-bounds: arch/alpha/include/asm/string.h:22:16: warning:
    '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] arch/x86/include/asm/string_32.h:182:25:
    warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] The problem is that the original code is trying to copy 6 bytes of data into a one-byte size member _config_ of the wrong structue FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a legitimate compiler warning because memcpy() overruns the length of &com.cmd.ConfigureBuffers.config. It seems that the right structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains 6 more members apart from the header _hdr_. Also, the name of the function ngene_command_config_free_buf() suggests that the actual intention is to ConfigureFreeBuffers, instead of ConfigureBuffers (which takes place in the function ngene_command_config_buf(), above). Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as the destination address, instead of &com.cmd.ConfigureBuffers.config, when calling memcpy(). This also helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). (CVE-2021-47288)

  - 已修复 Linux 内核中的下列漏洞：nvme: fix a possible use-after-free in controller reset during load Unlike .queue_rq, in .submit_async_event drivers may not check the ctrl readiness for AER submission. This may lead to a use-after-free condition that was observed with nvme-tcp.
    The race condition may happen in the following scenario: 1. driver executes its reset_ctrl_work 2. -> nvme_stop_ctrl - flushes ctrl async_event_work 3. ctrl sends AEN which is received by the host, which in turn schedules AEN handling 4. teardown admin queue (which releases the queue socket) 5. AEN processed, submits another AER, calling the driver to submit 6. driver attempts to send the cmd ==> use-after-free In order to fix that, add ctrl state check to validate the ctrl is actually able to accept the AER submission. This addresses the above race in controller resets because the driver during teardown should:
    1. change ctrl state to RESETTING 2. flush async_event_work (as well as other async work elements) So after 1,2, any other AER command will find the ctrl state to be RESETTING and bail out without submitting the AER. (CVE-2022-48790)

  - 已修复 Linux 内核中的下列漏洞：scsi: pm8001: Fix use-after-free for aborted TMF sas_task Currently a use-after-free may occur if a TMF sas_task is aborted before we handle the IO completion in mpi_ssp_completion(). The abort occurs due to timeout. When the timeout occurs, the SAS_TASK_STATE_ABORTED flag is set and the sas_task is freed in pm8001_exec_internal_tmf_task(). However, if the I/O completion occurs later, the I/O completion still thinks that the sas_task is available. Fix this by clearing the ccb->task if the TMF times out - the I/O completion handler does nothing if this pointer is cleared. (CVE-2022-48791)

  - 已修复 Linux 内核中的下列漏洞：tracing: Free buffers when a used dynamic event is removed After 65536 dynamic events have been added and removed, the type field of the event then uses the first type number that is available (not currently used by other events). A type number is the identifier of the binary blobs in the tracing ring buffer (known as events) to map them to logic that can parse the binary blob. The issue is that if a dynamic event (like a kprobe event) is traced and is in the ring buffer, and then that event is removed (because it is dynamic, which means it can be created and destroyed), if another dynamic event is created that has the same number that new event's logic on parsing the binary blob will be used. To show how this can be an issue, the following can crash the kernel: # cd /sys/kernel/tracing # for i in `seq 65536`; do echo 'p:kprobes/foo do_sys_openat2 $arg1:u32' > kprobe_events # done For every iteration of the above, the writing to the kprobe_events will remove the old event and create a new one (with the same format) and increase the type number to the next available on until the type number reaches over 65535 which is the max number for the 16 bit type. After it reaches that number, the logic to allocate a new number simply looks for the next available number.
    When an dynamic event is removed, that number is then available to be reused by the next dynamic event created. That is, once the above reaches the max number, the number assigned to the event in that loop will remain the same. Now that means deleting one dynamic event and created another will reuse the previous events type number. This is where bad things can happen. After the above loop finishes, the kprobes/foo event which reads the do_sys_openat2 function call's first parameter as an integer. # echo 1 > kprobes/foo/enable # cat /etc/passwd > /dev/null # cat trace cat-2211 [005] .... 2007.849603: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849620: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849838: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 cat-2211 [005] .... 2007.849880: foo:
    (do_sys_openat2+0x0/0x130) arg1=4294967196 # echo 0 > kprobes/foo/enable Now if we delete the kprobe and create a new one that reads a string: # echo 'p:kprobes/foo do_sys_openat2 +0($arg2):string' > kprobe_events And now we can the trace: # cat trace sendmail-1942 [002] ..... 530.136320: foo:
    (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.930817: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.930961: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.934278: foo: (do_sys_openat2+0x0/0x240) arg1= cat-2046 [004] ..... 530.934563: foo: (do_sys_openat2+0x0/0x240) arg1= ---truncated--- (CVE-2022-49006)

  - 已修复 Linux 内核中的下列漏洞：dm raid: fix accesses beyond end of raid member array On dm-raid table load (using raid_ctr), dm-raid allocates an array rs->devs[rs->raid_disks] for the raid device members. rs->raid_disks is defined by the number of raid metadata and image tupples passed into the target's constructor. In the case of RAID layout changes being requested, that number can be different from the current number of members for existing raid sets as defined in their superblocks. Example RAID layout changes include: - raid1 legs being added/removed - raid4/5/6/10 number of stripes changed (stripe reshaping) - takeover to higher raid level (e.g. raid5 -> raid6) When accessing array members, rs->raid_disks must be used in control loops instead of the potentially larger value in rs->md.raid_disks. Otherwise it will cause memory access beyond the end of the rs->devs array. Fix this by changing code that is prone to out-of-bounds access. Also fix validate_raid_redundancy() to validate all devices that are added. Also, use braces to help clean up raid_iterate_devices(). The out-of-bounds memory accesses was discovered using KASAN. This commit was verified to pass all LVM2 RAID tests (with KASAN enabled). (CVE-2022-49674)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

如 TuxCare CENTOS8.5：CLSA-2026：1782146775公告所述，CentOS Linux 8.5 主机上安装的程序包受到多个漏洞的影响。

  - Linux 内核 CIFS 实现版本 4.9.0 容易受到目录条目列表中相对路径注入的影响。(CVE-2019-10220)

  - Linux 内核 4.20.5 及其之前版本的 KVM 实现中存在释放后使用。(CVE-2019-7221)

  - BlueZ 中存在输入验证不当的情况，未经身份验证的用户可能利用此漏洞，通过邻近访问，提升权限。(CVE-2020-12351)

  - BlueZ 中存在访问控制不当的情况，未经身份验证的用户可利用此问题，通过邻近访问造成信息泄露。(CVE-2020-12352)

  - BlueZ 中存在缓冲区限制不当的情况，未经身份验证的用户可能会利用此漏洞，通过邻近访问来造成拒绝服务。这会影响所有支持 BlueZ 的 Linux 内核版本。(CVE-2020-24490)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程主机上安装的内核版本低于 5.10.176-157.645。因此，会受到 ALAS2KERNEL-5.10-2024-059 公告中提及的多个漏洞影响。

    在 Linux 内核中，以下漏洞已修复：

    ext4在 ext4_mb_clear_bb() 中使用之前必须验证块范围 (CVE-2022-50021)

    在 Linux 内核中，以下漏洞已修复：

    blockbfq修复“bfqq->bic”可能的 uaf (CVE-2022-50488)

    在 Linux 内核中，以下漏洞已修复：

    seccomp将 copy_seccomp() 移动到无故障路径。 (CVE-2022-50661)

    在 6.2.8 及之前版本的 Linux 内核的 arch/x86/kvm/vmx/nested.c 中发现了一个问题。x86_64 上的 nVMX 缺少对 CR0 和 CR4 的一致性检查。(CVE-2023-30456)

    在 Linux 内核中，以下漏洞已修复：

    ftrace：修复索引为 0 时 lookup_rec() 中的无效地址访问 (CVE-2023-53075)

    在 Linux 内核中，以下漏洞已修复：

    drm/shmem-helper删除错误路径中另一个错误的放置 (CVE-2023-53084)

    在 Linux 内核中，以下漏洞已修复：

    drm/i915/active修复将非空闲屏障误用为屏障跟踪器 (CVE-2023-53087)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 ext4_xattr_delete_inode 中任务挂起（CVE-2023-53089）

    在 Linux 内核中，以下漏洞已修复：

    互连修复释放节点时的内存泄漏 (CVE-2023-53096)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 ext4_update_inline_data 中的警告 (CVE-2023-53100)

    在 Linux 内核中，以下漏洞已修复：

    ext4：初始化 bootloader inode 时，i_disksize 为零 (CVE-2023-53101)

    在 Linux 内核中，以下漏洞已修复：

    net：tunnels：对 dev->needed_headroom 的无锁访问进行注解 (CVE-2023-53109)

    在 Linux 内核中，以下漏洞已修复：

    i40e修复适配器处于恢复模式时重新启动期间的内核崩溃 (CVE-2023-53114)

    在 Linux 内核中，以下漏洞已修复：

    nvmet：避免 nvmet_req_complete() 中潜在的 UAF (CVE-2023-53116)

    在 Linux 内核中，以下漏洞已修复：

    fs：关闭文件描述符时防止越界数组推测 (CVE-2023-53117)

    在 Linux 内核中，以下漏洞已修复：

    tcp：可从进程上下文调用 tcp_make_synack() (CVE-2023-53121)

    在 Linux 内核中，以下漏洞已修复：

    scsimpt3sas修复 mpt3sas_transport_port_add() 中的空指针访问 (CVE-2023-53124)

    在 Linux 内核中，以下漏洞已修复：

    net：usb：smsc75xx：将数据包长度限制为 skb->len (CVE-2023-53125)

    在 Linux 内核中，以下漏洞已修复：

    SUNRPC：修复服务器关机泄漏 (CVE-2023-53131)

    在 Linux 内核中，以下漏洞已修复：

    bnxt_en避免 TPA 数据的 order-5 内存分配 (CVE-2023-53134)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复移动目录时可能发生损坏的问题 (CVE-2023-53137)

    在 Linux 内核中，以下漏洞已修复：

    scsicore提前删除 /proc/scsi/${proc_name} 目录 (CVE-2023-53140)

    在 Linux 内核中，以下漏洞已修复：

    ila：不在 ila_xlat_nl_cmd_get_mapping() 中生成空消息 (CVE-2023-53141)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 1k 块文件系统上的另一个 off-by-one fsmap 错误 (CVE-2023-53143)

    在 Linux 内核中，以下漏洞已修复：

    arm64efi使 efi_rt_lock 成为 raw_spinlock (CVE-2023-53216)

    在 Linux 内核中，以下漏洞已修复：

    KVMVMX修复因未初始化 current_vmcs 造成的崩溃 (CVE-2023-53756)

    在 Linux 内核中，以下漏洞已修复：

    iommu/amd为 ivrs_acpihid 命令行参数添加长度限制 (CVE-2023-54057)

Tenable 已直接从测试产品的安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程主机上安装的内核版本低于 5.15.104-63.140。因此，会受到 ALAS2KERNEL-5.15-2023-019 公告中提及的多个漏洞影响。

    在 Linux 内核中，以下漏洞已修复：

    ext4在 ext4_mb_clear_bb() 中使用之前必须验证块范围 (CVE-2022-50021)

    Linux 内核性能事件系统中存在一个释放后使用漏洞，攻击者可利用此漏洞实现本地特权提升。

    perf_group_detach 函数在调用 add_event_to_groups() 前未检查事件同级组件的 attach_state，但是 remove_on_exec 可以在从其群组分离之前调用 list_del_event()，从而可以使用悬摆指针造成释放后使用漏洞。

    我们建议升级过去的提交 fd0815f632c24878e325821943edccc7fde947a2。(CVE-2023-2235)

    在 6.2.8 及之前版本的 Linux 内核的 arch/x86/kvm/vmx/nested.c 中发现了一个问题。x86_64 上的 nVMX 缺少对 CR0 和 CR4 的一致性检查。(CVE-2023-30456)

    在 Linux 内核中，以下漏洞已修复：

    ftrace：修复索引为 0 时 lookup_rec() 中的无效地址访问 (CVE-2023-53075)

    在 Linux 内核中，以下漏洞已修复：

    drm/shmem-helper删除错误路径中另一个错误的放置 (CVE-2023-53084)

    在 Linux 内核中，以下漏洞已修复：

    drm/i915/active修复将非空闲屏障误用为屏障跟踪器 (CVE-2023-53087)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 ext4_xattr_delete_inode 中任务挂起（CVE-2023-53089）

    在 Linux 内核中，以下漏洞已修复：

    ext4如果 s_journal_inum 在日志重播后发生更改则更新 s_journal_inum (CVE-2023-53091)

    在 Linux 内核中，以下漏洞已修复：

    互连修复释放节点时的内存泄漏 (CVE-2023-53096)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 ext4_update_inline_data 中的警告 (CVE-2023-53100)

    在 Linux 内核中，以下漏洞已修复：

    ext4：初始化 bootloader inode 时，i_disksize 为零 (CVE-2023-53101)

    在 Linux 内核中，以下漏洞已修复：

    bonding如果 non-eth dev enslave 失败则还原绑定的 IFF_SLAVE 标记 (CVE-2023-53103)

    在 Linux 内核中，以下漏洞已修复：

    net：tunnels：对 dev->needed_headroom 的无锁访问进行注解 (CVE-2023-53109)

    在 Linux 内核中，以下漏洞已修复：

    loop修复释放后使用问题 (CVE-2023-53111)

    在 Linux 内核中，以下漏洞已修复：

    fs：关闭文件描述符时防止越界数组推测 (CVE-2023-53117)

    在 Linux 内核中，以下漏洞已修复：

    tcp：可从进程上下文调用 tcp_make_synack() (CVE-2023-53121)

    在 Linux 内核中，以下漏洞已修复：

    PCIs390通过按功能热插拔修复 PCI 资源的释放后使用 (CVE-2023-53123)

    在 Linux 内核中，以下漏洞已修复：

    SUNRPC：修复服务器关机泄漏 (CVE-2023-53131)

    在 Linux 内核中，以下漏洞已修复：

    bpfsockmap修复当 len 为 tcp_bpf_recvmsg_parser() 中的 0 时出现的无限循环错误 (CVE-2023-53133)

    在 Linux 内核中，以下漏洞已修复：

    af_unix修复 OOB 支持中的结构 pid 泄漏 (CVE-2023-53136)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复移动目录时可能发生损坏的问题 (CVE-2023-53137)

    在 Linux 内核中，以下漏洞已修复：

    scsicore提前删除 /proc/scsi/${proc_name} 目录 (CVE-2023-53140)

    在 Linux 内核中，以下漏洞已修复：

    ila：不在 ila_xlat_nl_cmd_get_mapping() 中生成空消息 (CVE-2023-53141)

    在 Linux 内核中，以下漏洞已修复：

    ext4：修复 1k 块文件系统上的另一个 off-by-one fsmap 错误 (CVE-2023-53143)

    在 Linux 内核中，以下漏洞已修复：

    x86/resctrl清除使用之前和之后的 staged_config[] (CVE-2023-53169)

    在 Linux 内核中，以下漏洞已修复：

    arm64efi使 efi_rt_lock 成为 raw_spinlock (CVE-2023-53216)

    在 Linux 内核中，以下漏洞已修复：

    KVMVMX修复因未初始化 current_vmcs 造成的崩溃 (CVE-2023-53756)

    在 Linux 内核中，以下漏洞已修复：

    iommu/amd为 ivrs_acpihid 命令行参数添加长度限制 (CVE-2023-54057)

Tenable 已直接从测试产品的安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
244444	Linux Distros 未修补的漏洞：CVE-2022-50021	Nessus	Misc.	2025/8/6	2026/9/30	high
352525	CentOS Linux 8.4 [TuxCare] 安全更新：bpftool / kernel / kernel-core / kernel-cross-headers / 等多个漏洞（CENTOS8.4：CLSA-2026：1783414634）	Nessus	CentOS Local Security Checks	2026/9/30	2026/9/30	high
352893	CentOS Linux 8 [TuxCare] 安全更新：bpftool / kernel / kernel-core / kernel-cross-headers / 等多个漏洞（CENTOS-STREAM8：CLSA-2026：1783790425）	Nessus	CentOS Local Security Checks	2026/9/30	2026/10/1	critical
353232	CentOS Linux 7 [TuxCare] 安全更新：bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / 等多个漏洞（CENTOS7：CLSA-2026：1782148320）	Nessus	CentOS Local Security Checks	2026/9/30	2026/9/30	high
360215	CentOS Linux 8.5 [TuxCare] 安全更新：bpftool / kernel / kernel-core / kernel-cross-headers / 等多个漏洞（CENTOS8.5：CLSA-2026：1782146775）	Nessus	CentOS Local Security Checks	2026/10/1	2026/10/1	high
200362	Amazon Linux 2 内核 --advisory ALAS2KERNEL-5。10-2024-059 (ALASKERNEL-5.10-2024-059)	Nessus	Amazon Linux Local Security Checks	2024/6/11	2026/2/9	high
176754	Amazon Linux 2 内核 --advisory ALAS2KERNEL-5。15-2023-019 (ALASKERNEL-5.15-2023-019)	Nessus	Amazon Linux Local Security Checks	2023/6/6	2026/2/9	high

检测

插件搜索

high

high

critical

high

high

high

high