AlmaLinux 9.2 主机上存在安装的程序包，该程序包受到 TuxCare ALMALINUX9.2：CLSA-2026：1783791447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：phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED _before_ calling device_register(), because put_device() should be called even in case of device_register() failure. (CVE-2021-47416)

  - 在 Linux 内核的 TeleTYpe 子系统中发现越界读取缺陷。在 flush_to_ldisc 函数中存在内存泄漏时，用户使用 ioctls TIOCSPTLCK 和 TIOCGPTPEER 以及 TIOCSTI 和 TCXONC 触发争用条件时会发生此问题。此缺陷会让本地用户导致系统崩溃或从内存读取未经授权的随机数据。 (CVE-2022-1462)

  - 已修复 Linux 内核中的下列漏洞：can: isotp: sanitize CAN ID checks in isotp_bind() Syzbot created an environment that lead to a state machine status that can not be reached with a compliant CAN ID address configuration. The provided address information consisted of CAN ID 0x6000001 and 0xC28001 which both boil down to 11 bit CAN IDs 0x001 in sending and receiving. Sanitize the SFF/EFF CAN ID values before performing the address checks. (CVE-2022-49269)

  - 已修复 Linux 内核中的下列漏洞：tty: fix deadlock caused by calling printk() under tty_port->lock pty_write() invokes kmalloc() which may invoke a normal printk() to print failure message. This can cause a deadlock in the scenario reported by syz-bot below: CPU0 CPU1 CPU2 ----
    ---- ---- lock(console_owner); lock(&port_lock_key); lock(&port->lock); lock(&port_lock_key);
    lock(&port->lock); lock(console_owner); As commit dbdda842fe96 (printk: Add console owner and waiter logic to load balance console writes) said, such deadlock can be prevented by using printk_deferred() in kmalloc() (which is invoked in the section guarded by the port->lock). But there are too many printk() on the kmalloc() path, and kmalloc() can be called from anywhere, so changing printk() to printk_deferred() is too complicated and inelegant. Therefore, this patch chooses to specify __GFP_NOWARN to kmalloc(), so that printk() will not be called, and this deadlock problem can be avoided. Syzbot reported the following lockdep error: ====================================================== WARNING: possible circular locking dependency detected 5.4.143-00237-g08ccc19a-dirty #10 Not tainted
    ------------------------------------------------------ syz-executor.4/29420 is trying to acquire lock:
    ffffffff8aedb2a0 (console_owner){....}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1752 [inline] ffffffff8aedb2a0 (console_owner){....}-{0:0}, at: vprintk_emit+0x2ca/0x470 kernel/printk/printk.c:2023 but task is already holding lock: ffff8880119c9158 (&port->lock){-.-.}-{2:2}, at: pty_write+0xf4/0x1f0 drivers/tty/pty.c:120 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&port->lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x35/0x50 kernel/locking/spinlock.c:159 tty_port_tty_get drivers/tty/tty_port.c:288 [inline] <-- lock(&port->lock);
    tty_port_default_wakeup+0x1d/0xb0 drivers/tty/tty_port.c:47 serial8250_tx_chars+0x530/0xa80 drivers/tty/serial/8250/8250_port.c:1767 serial8250_handle_irq.part.0+0x31f/0x3d0 drivers/tty/serial/8250/8250_port.c:1854 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1827 [inline] <-- lock(&port_lock_key); serial8250_default_handle_irq+0xb2/0x220 drivers/tty/serial/8250/8250_port.c:1870 serial8250_interrupt+0xfd/0x200 drivers/tty/serial/8250/8250_core.c:126 __handle_irq_event_percpu+0x109/0xa50 kernel/irq/handle.c:156 [...] -> #1 (&port_lock_key){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x35/0x50 kernel/locking/spinlock.c:159 serial8250_console_write+0x184/0xa40 drivers/tty/serial/8250/8250_port.c:3198 <-- lock(&port_lock_key);
    call_console_drivers kernel/printk/printk.c:1819 [inline] console_unlock+0x8cb/0xd00 kernel/printk/printk.c:2504 vprintk_emit+0x1b5/0x470 kernel/printk/printk.c:2024 <-- lock(console_owner);
    vprintk_func+0x8d/0x250 kernel/printk/printk_safe.c:394 printk+0xba/0xed kernel/printk/printk.c:2084 register_console+0x8b3/0xc10 kernel/printk/printk.c:2829 univ8250_console_init+0x3a/0x46 drivers/tty/serial/8250/8250_core.c:681 console_init+0x49d/0x6d3 kernel/printk/printk.c:2915 start_kernel+0x5e9/0x879 init/main.c:713 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 -> #0 (console_owner){....}-{0:0}: [...] lock_acquire+0x127/0x340 kernel/locking/lockdep.c:4734 console_trylock_spinning kernel/printk/printk.c:1773 ---truncated--- (CVE-2022-49441)

  - 已修复 Linux 内核中的下列漏洞：list: fix a data-race around ep->rdllist ep_poll() first calls ep_events_available() with no lock held and checks if ep->rdllist is empty by list_empty_careful(), which reads rdllist->prev. Thus all accesses to it need some protection to avoid store/load-tearing. Note INIT_LIST_HEAD_RCU() already has the annotation for both prev and next.
    Commit bf3b9f6372c4 (epoll: Add busy poll support to epoll with socket fds.) added the first lockless ep_events_available(), and commit c5a282e9635e (fs/epoll: reduce the scope of wq lock in epoll_wait()) made some ep_events_available() calls lockless and added single call under a lock, finally commit e59d3c64cba6 (epoll: eliminate unnecessary lock for zero timeout) made the last ep_events_available() lockless. BUG: KCSAN: data-race in do_epoll_wait / do_epoll_wait write to 0xffff88810480c7d8 of 8 bytes by task 1802 on cpu 0: INIT_LIST_HEAD include/linux/list.h:38 [inline] list_splice_init include/linux/list.h:492 [inline] ep_start_scan fs/eventpoll.c:622 [inline] ep_send_events fs/eventpoll.c:1656 [inline] ep_poll fs/eventpoll.c:1806 [inline] do_epoll_wait+0x4eb/0xf40 fs/eventpoll.c:2234 do_epoll_pwait fs/eventpoll.c:2268 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2281 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2275 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810480c7d8 of 8 bytes by task 1799 on cpu 1: list_empty_careful include/linux/list.h:329 [inline] ep_events_available fs/eventpoll.c:381 [inline] ep_poll fs/eventpoll.c:1797 [inline] do_epoll_wait+0x279/0xf40 fs/eventpoll.c:2234 do_epoll_pwait fs/eventpoll.c:2268 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2281 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2275 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff88810480c7d0 -> 0xffff888103c15098 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1799 Comm: syz-fuzzer Tainted:
    G W 5.17.0-rc7-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 (CVE-2022-49443)

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。

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。

  - 已修复 Linux 内核中的下列漏洞：bpf, sockmap: Reject sk_msg egress redirects to non-TCP sockets With a SOCKMAP/SOCKHASH map and an sk_msg program user can steer messages sent from one TCP socket (s1) to actually egress from another TCP socket (s2): tcp_bpf_sendmsg(s1) // = sk_prot->sendmsg tcp_bpf_send_verdict(s1) // __SK_REDIRECT case tcp_bpf_sendmsg_redir(s2) tcp_bpf_push_locked(s2) tcp_bpf_push(s2) tcp_rate_check_app_limited(s2) // expects tcp_sock tcp_sendmsg_locked(s2) // ditto There is a hard-coded assumption in the call-chain, that the egress socket (s2) is a TCP socket. However in commit 122e6c79efe1 (sock_map: Update sock type checks for UDP) we have enabled redirects to non-TCP sockets. This was done for the sake of BPF sk_skb programs. There was no indention to support sk_msg send-to-egress use case. As a result, attempts to send-to-egress through a non-TCP socket lead to a crash due to invalid downcast from sock to tcp_sock: BUG: kernel NULL pointer dereference, address: 000000000000002f ... Call Trace: <TASK> ? show_regs+0x60/0x70 ? __die+0x1f/0x70 ? page_fault_oops+0x80/0x160 ? do_user_addr_fault+0x2d7/0x800 ? rcu_is_watching+0x11/0x50 ? exc_page_fault+0x70/0x1c0 ? asm_exc_page_fault+0x27/0x30 ? tcp_tso_segs+0x14/0xa0 tcp_write_xmit+0x67/0xce0 __tcp_push_pending_frames+0x32/0xf0 tcp_push+0x107/0x140 tcp_sendmsg_locked+0x99f/0xbb0 tcp_bpf_push+0x19d/0x3a0 tcp_bpf_sendmsg_redir+0x55/0xd0 tcp_bpf_send_verdict+0x407/0x550 tcp_bpf_sendmsg+0x1a1/0x390 inet_sendmsg+0x6a/0x70 sock_sendmsg+0x9d/0xc0 ? sockfd_lookup_light+0x12/0x80 __sys_sendto+0x10e/0x160 ? syscall_enter_from_user_mode+0x20/0x60 ?
    __this_cpu_preempt_check+0x13/0x20 ? lockdep_hardirqs_on+0x82/0x110 __x64_sys_sendto+0x1f/0x30 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Reject selecting a non-TCP sockets as redirect target from a BPF sk_msg program to prevent the crash. When attempted, user will receive an EACCES error from send/sendto/sendmsg() syscall. (CVE-2023-52523)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

远程主机上安装的内核版本低于 5.15.136-90.144。因此，会受到 ALAS2KERNEL-5.15-2023-029 公告中提及的多个漏洞影响。

    2024-07-03：已将 CVE-2023-52504 添加到此公告中。

    2024-07-03：已将 CVE-2023-52559 添加到此公告中。

    2024-07-03：已将 CVE-2023-52522 添加到此公告中。

    2024-07-03：已将 CVE-2023-52523 添加到此公告中。

    2024-06-06：已将 CVE-2023-52477 添加到此公告中。

    2024-02-01：已将 CVE-2024-0641 添加到此公告中。

    内核 Xen 事件处理程序中存在的一个缺陷可造成非特权 Xen 客户机中 Xen 控制台处理出现死锁问题。(CVE-2023-34324)

    在 Linux 内核中，以下漏洞已修复：

    usb: hub：防止访问未初始化的 BOS 描述符 (CVE-2023-52477)

    在 Linux 内核中，以下漏洞已修复：

    x86/alternatives：禁用 apply_alternatives() 中的 KASAN (CVE-2023-52504)

    在 Linux 内核中，以下漏洞已修复：

    net：修复 neigh_periodic_work() 中可能存在的存储拆分问题 (CVE-2023-52522)

    在 Linux 内核中，以下漏洞已修复：

    bpf、sockmap：拒绝重定向到非 TCP 套接字的 sk_msg 出口（CVE-2023-52523）

    在 Linux 内核中，以下漏洞已修复：

    iommu/vt-d：避免 iommu_suspend() 中的内存分配 (CVE-2023-52559)

    在 Linux 内核的 TIPC 子系统中，在 net/tipc/crypto.c 的 tipc_crypto_key_revoke 中发现了一个拒绝服务漏洞。此缺陷允许具有本地用户权限的客户机触发死锁，并可能导致系统崩溃。(CVE-2024-0641)

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。

因此，它受到 ALAS2023-2023-422 公告中提及的多个漏洞影响。

    2024-07-03：已将 CVE-2023-52522 添加到此公告中。

    2024-07-03：已将 CVE-2023-52559 添加到此公告中。

    2024-07-03：已将 CVE-2023-52523 添加到此公告中。

    2024-06-06：已将 CVE-2023-52481 添加到此公告中。

    2024-06-06：已将 CVE-2023-52476 添加到此公告中。

    2024-06-06：已将 CVE-2023-52477 添加到此公告中。

    2024-02-01：已将 CVE-2024-0641 添加到此公告中。

    内核 Xen 事件处理程序中存在的一个缺陷可造成非特权 Xen 客户机中 Xen 控制台处理出现死锁问题。(CVE-2023-34324)

    Linux 内核的 eBPF 子系统中发现不正确的输入验证缺陷。此问题是在执行用户提供的 eBPF 程序之前，未对其进行正确的动态指针验证所致。具有 CAP_BPF 权限的攻击者可利用此缺陷在内核环境中提升权限和执行任意代码。(CVE-2023-39191)

    在 Linux 内核中，以下漏洞已修复：

    perf/x86/lbr：筛选 vsyscall 地址 (CVE-2023-52476)

    在 Linux 内核中，以下漏洞已修复：

    usb: hub：防止访问未初始化的 BOS 描述符 (CVE-2023-52477)

    在 Linux 内核中，以下漏洞已修复：

    arm64：erratas：添加 Cortex-A520 推测非特权加载变通方案 (CVE-2023-52481)

    在 Linux 内核中，以下漏洞已修复：

    net：修复 neigh_periodic_work() 中可能存在的存储拆分问题 (CVE-2023-52522)

    在 Linux 内核中，以下漏洞已修复：

    bpf、sockmap：拒绝重定向到非 TCP 套接字的 sk_msg 出口（CVE-2023-52523）

    在 Linux 内核中，以下漏洞已修复：

    iommu/vt-d：避免 iommu_suspend() 中的内存分配 (CVE-2023-52559)

    在 Linux 内核的 TIPC 子系统中，在 net/tipc/crypto.c 的 tipc_crypto_key_revoke 中发现了一个拒绝服务漏洞。此缺陷允许具有本地用户权限的客户机触发死锁，并可能导致系统崩溃。(CVE-2024-0641)

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
352871	AlmaLinux 9.2 [TuxCare] 安全更新：bpftool / kernel / kernel-abi-stablelists / kernel-core / 等多个漏洞（ALMALINUX9.2：CLSA-2026：1783791447）	Nessus	Alma Linux Local Security Checks	2026/9/30	2026/10/1	medium
247275	Linux Distros 未修补的漏洞：CVE-2023-52523	Nessus	Misc.	2025/8/10	2026/9/30	medium
184184	Amazon Linux 2：内核 (ALASKERNEL-5.15-2023-029)	Nessus	Amazon Linux Local Security Checks	2023/11/1	2026/2/26	high
184420	Amazon Linux 2023：bpftool、kernel、kernel-devel (ALAS2023-2023-422)	Nessus	Amazon Linux Local Security Checks	2023/11/4	2026/2/24	high

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