CVE-2026-46227— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SCTP_SENDALL路径中sctp_sendmsg_to_asoc可能释放套接字锁，导致其他线程迁移或释放缓存的列表游标tmp，造成释放后重用。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 4910280503f3af2857d5aa77e35b22d93a8960a8< f3a3f0b406b4b7eb3cea35a23fa2bf170848b104 |
affected |
4910280503f3af2857d5aa77e35b22d93a8960a8< 0dbc8cde64280fc37cdd678cced34eaf96cfb197 |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< 0c7b55974f97b78d1109025eadf084e74cbf330f |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< 1bfb06ecb00f7fdf35dba8e8f2877346cbe5e078 |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< 6187a172d6ed57d6b2c327836e4407c6456e639d |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< c9dadb31f36045a8cb65df4bd75e7237ef21a4b5 |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< bf0f40d8107e2ce827521968dc6926f3e13728ae |
affected | ||
4910280503f3af2857d5aa77e35b22d93a8960a8< abb5f36771cc4c05899b34000829a787572a8817 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-46227 基础信息
漏洞信息
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Vulnerability Title
sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL
The SCTP_SENDALL path in sctp_sendmsg() iterates ep->asocs with
list_for_each_entry_safe(), which caches the next entry in @tmp before
the loop body runs. The body calls sctp_sendmsg_to_asoc(), which may
drop the socket lock inside sctp_wait_for_sndbuf().
While the lock is dropped, another thread can SCTP_SOCKOPT_PEELOFF the
association cached in @tmp, migrating it to a new endpoint via
sctp_sock_migrate() (list_del_init() + list_add_tail() to
newep->asocs), and optionally close the new socket which frees the
association via kfree_rcu(). The cached @tmp can also be freed by a
network ABORT for that association, processed in softirq while the
lock is dropped.
sctp_wait_for_sndbuf() revalidates @asoc (the current entry) on re-lock
via the "sk != asoc->base.sk" and "asoc->base.dead" checks, but nothing
revalidates @tmp. After a successful return, the iterator advances to
the stale @tmp, yielding either a use-after-free (if the peeled socket
was closed) or a list-walk onto the new endpoint's list head (type
confusion of &newep->asocs as a struct sctp_association *).
Both are reachable from CapEff=0; the type-confusion path gives
controlled indirect call via the outqueue.sched->init_sid pointer.
Fix by re-deriving @tmp from @asoc after sctp_sendmsg_to_asoc()
returns. @asoc is known to still be on ep->asocs at that point: the
only callers that list_del an association from ep->asocs are
sctp_association_free() (which sets asoc->base.dead) and
sctp_assoc_migrate() (which changes asoc->base.sk), and
sctp_wait_for_sndbuf() checks both under the lock before any
successful return; a tripped check propagates as err < 0 and the loop
bails before the re-derive.
The SCTP_ABORT path in sctp_sendmsg_check_sflags() returns 0 and the
loop hits 'continue' before sctp_sendmsg_to_asoc() is ever called, so
the @tmp cached by list_for_each_entry_safe() still covers the
lock-held free that ba59fb027307 ("sctp: walk the list of asoc
safely") was added for.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SCTP_SENDALL路径中sctp_sendmsg_to_asoc可能释放套接字锁，导致其他线程迁移或释放缓存的列表游标tmp，造成释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-46227 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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未找到公开 POC。
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CVE-2026-46227 补丁与修复 (8)
同批安全公告 · Linux · 2026-05-28 · 共 135 条
| CVE-2026-46135 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46137 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46115 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46195 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46155 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46119 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46185 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46212 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46166 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46125 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46152 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46198 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46238 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46113 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46174 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46138 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46232 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46129 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46173 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46157 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 135 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-46227
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