Oracle Linux 10 / 9：Unbreakable Enterprise 内核 (ELSA-2026-50260)
high Nessus 插件 ID 314333
语言：
简介
远程 Oracle Linux 主机缺少一个或多个安全更新。描述
远程 Oracle Linux 10 / 9 主机上安装的多个程序包受到 ELSA-2026-50260 公告中提及的多个漏洞影响。- 已修复 Linux 内核中的下列漏洞：ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF. (CVE-2025-40135)
- 此漏洞由 AMD 发现并解决。我们在安全更新指南中对此进行了记载，以鼓励客户尽快安装 2026 年 5 月版的 Windows。分配给此 CVE 的漏洞存在于 AMD 提供的某些处理器型号中。需要 Windows 更新才能缓解此漏洞。该 CVE 记录在安全更新指南中，宣布最新版本的 Windows 已启用缓解措施并提供针对该漏洞的保护。有关更多信息，请参阅以下部分：AMD-SB-7052 （CVE-2025-54518）
- 已修复 Linux 内核中的下列漏洞：dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() syzbot was able to crash the kernel in rt6_uncached_list_flush_dev() in an interesting way [1] Crash happens in list_del_init()/INIT_LIST_HEAD() while writing list->prev, while the prior write on list->next went well. static inline void INIT_LIST_HEAD(struct list_head *list) { WRITE_ONCE(list->next, list); // This went well WRITE_ONCE(list->prev, list); // Crash, @list has been freed. } Issue here is that rt6_uncached_list_del() did not attempt to lock ul->lock, as list_empty(&rt->dst.rt_uncached) returned true because the WRITE_ONCE(list->next, list) happened on the other CPU. We might use list_del_init_careful() and list_empty_careful(), or make sure rt6_uncached_list_del() always grabs the spinlock whenever rt->dst.rt_uncached_list has been set. A similar fix is neeed for IPv4. [1] BUG: KASAN: slab-use-after-free in INIT_LIST_HEAD include/linux/list.h:46 [inline] BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:296 [inline] BUG: KASAN: slab-use-after-free in rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] BUG: KASAN: slab-use-after-free in rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020 Write of size 8 at addr ffff8880294cfa78 by task kworker/u8:14/3450 CPU: 0 UID: 0 PID: 3450 Comm: kworker/u8:14 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: netns cleanup_net Call Trace: <TASK> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 INIT_LIST_HEAD include/linux/list.h:46 [inline] list_del_init include/linux/list.h:296 [inline] rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020 addrconf_ifdown+0x143/0x18a0 net/ipv6/addrconf.c:3853 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] netif_close_many+0x29c/0x410 net/core/dev.c:1785 unregister_netdevice_many_notify+0xb50/0x2330 net/core/dev.c:12353 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline] ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> Allocated by task 803: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x18d/0x6c0 mm/slub.c:5270 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x460 net/ipv6/route.c:3333 mld_sendpack+0x683/0xe60 net/ipv6/mcast.c:1844 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entr ---truncated--- (CVE-2026-23004)
- 已修复 Linux 内核中的下列漏洞：tls: Fix race condition in tls_sw_cancel_work_tx() This issue was discovered during a code audit. After cancel_delayed_work_sync() is called from tls_sk_proto_close(), tx_work_handler() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the tx_work_handler() worker may dereference a freed TLS object.
The following is a simple race scenario: cpu0 cpu1 tls_sk_proto_close() tls_sw_cancel_work_tx() tls_write_space() tls_sw_write_space() if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); cancel_delayed_work_sync(&ctx->tx_work.work);
schedule_delayed_work(&tx_ctx->tx_work.work, 0); To prevent this race condition, cancel_delayed_work_sync() is replaced with disable_delayed_work_sync(). (CVE-2026-23240)
- 已修复 Linux 内核中的下列漏洞：RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes. With a mismatched user MAD header size and RMPP header length, data_len can become negative and reach ib_create_send_mad(). This can make the padding calculation exceed the segment size and trigger an out-of-bounds memset in alloc_send_rmpp_list(). Add an explicit check to reject negative data_len before creating the send buffer. KASAN splat: [ 211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0 [ 211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102 [ 211.365867] ib_create_send_mad+0xa01/0x11b0 [ 211.365887] ib_umad_write+0x853/0x1c80 (CVE-2026-23243)
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。
解决方案
更新受影响的程序包。另见
插件详情
严重性: High
ID: 314333
文件名: oraclelinux_ELSA-2026-50260.nasl
版本: 1.3
类型: Local
代理: unix
发布时间: 2026/5/12
最近更新时间: 2026/5/13
支持的传感器: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus
风险信息
VPR
风险因素: Critical
分数: 10.0
CVSS v2
风险因素: Medium
基本分数: 6.8
时间分数: 5.9
矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 分数来源: CVE-2026-43500
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 7.5
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
时间矢量: CVSS:3.0/E:H/RL:O/RC:C
CVSS v4
风险因素: High
Base Score: 8.6
Threat Score: 8.6
Threat Vector: CVSS:4.0/E:A
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 分数来源: CVE-2026-31431
漏洞信息
CPE: p-cpe:/a:oracle:linux:kernel-uek64k-modules-extra-netfilter, p-cpe:/a:oracle:linux:kernel-uek-doc, p-cpe:/a:oracle:linux:kernel-uek64k-modules-deprecated, p-cpe:/a:oracle:linux:kernel-uek-modules-core, p-cpe:/a:oracle:linux:kernel-uek-modules-extra, p-cpe:/a:oracle:linux:kernel-uek-modules-wireless, p-cpe:/a:oracle:linux:kernel-uek64k-modules-extra, p-cpe:/a:oracle:linux:kernel-uek-modules, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:kernel-uek-debug, p-cpe:/a:oracle:linux:kernel-uek, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-core, p-cpe:/a:oracle:linux:kernel-uek64k, p-cpe:/a:oracle:linux:kernel-uek64k-modules, p-cpe:/a:oracle:linux:kernel-uek64k-modules-desktop, p-cpe:/a:oracle:linux:kernel-uek-debug-devel, p-cpe:/a:oracle:linux:kernel-uek-modules-deprecated, p-cpe:/a:oracle:linux:kernel-uek-modules-usb, p-cpe:/a:oracle:linux:kernel-uek-devel, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-wireless, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-extra-netfilter, p-cpe:/a:oracle:linux:kernel-uek64k-modules-usb, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-desktop, p-cpe:/a:oracle:linux:kernel-uek-debug-core, p-cpe:/a:oracle:linux:kernel-uek-modules-extra-netfilter, p-cpe:/a:oracle:linux:kernel-uek-tools, p-cpe:/a:oracle:linux:kernel-uek-debug-modules, cpe:/o:oracle:linux:10, p-cpe:/a:oracle:linux:kernel-uek64k-devel, p-cpe:/a:oracle:linux:kernel-uek-modules-desktop, p-cpe:/a:oracle:linux:kernel-uek64k-modules-wireless, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-usb, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-extra, p-cpe:/a:oracle:linux:kernel-uek64k-core, p-cpe:/a:oracle:linux:kernel-uek64k-modules-core, p-cpe:/a:oracle:linux:kernel-uek-core, p-cpe:/a:oracle:linux:kernel-uek-debug-modules-deprecated
必需的 KB 项: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux
可利用: true
易利用性: Exploits are available
补丁发布日期: 2026/5/10
漏洞发布日期: 2025/11/12
CISA 已知可遭利用的漏洞到期日期: 2026/5/15
可利用的方式
Core Impact
Metasploit (Copy Fail AF_ALG + authencesn Page-Cache Write)
参考资料信息
CVE: CVE-2025-40135, CVE-2025-54518, CVE-2026-23004, CVE-2026-23240, CVE-2026-23243, CVE-2026-23249, CVE-2026-23250, CVE-2026-23251, CVE-2026-23273, CVE-2026-23443, CVE-2026-31411, CVE-2026-31413, CVE-2026-31431, CVE-2026-43284, CVE-2026-43500
IAVA: 2026-A-0428