CVE-2025-23142— 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_sendmsg未检测释放的传输引用，可能导致释放后重用。
影响版本矩阵 30
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | df132eff463873e14e019a07f387b4d577d6d1f9< 547762250220325d350d0917a7231480e0f4142b |
affected |
df132eff463873e14e019a07f387b4d577d6d1f9< 3257386be6a7eb8a8bfc9cbfb746df4eb4fc70e8 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< 0f7df4899299ce4662e5f95badb9dbc57cc37fa5 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< 7a63f4fb0efb4e69efd990cbb740a848679ec4b0 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< c6fefcb71d246baaf3bacdad1af7ff50ebcfe652 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< 9e7c37fadb3be1fc33073fcf10aa96d166caa697 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< 5bc83bdf5f5b8010d1ca5a4555537e62413ab4e2 |
affected | ||
df132eff463873e14e019a07f387b4d577d6d1f9< 2e5068b7e0ae0a54f6cfd03a2f80977da657f1ee |
affected | ||
| … +22 条更多 | |||
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一、 漏洞 CVE-2025-23142 基础信息
漏洞信息
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Vulnerability Title
sctp: detect and prevent references to a freed transport in sendmsg
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: detect and prevent references to a freed transport in sendmsg
sctp_sendmsg() re-uses associations and transports when possible by
doing a lookup based on the socket endpoint and the message destination
address, and then sctp_sendmsg_to_asoc() sets the selected transport in
all the message chunks to be sent.
There's a possible race condition if another thread triggers the removal
of that selected transport, for instance, by explicitly unbinding an
address with setsockopt(SCTP_SOCKOPT_BINDX_REM), after the chunks have
been set up and before the message is sent. This can happen if the send
buffer is full, during the period when the sender thread temporarily
releases the socket lock in sctp_wait_for_sndbuf().
This causes the access to the transport data in
sctp_outq_select_transport(), when the association outqueue is flushed,
to result in a use-after-free read.
This change avoids this scenario by having sctp_transport_free() signal
the freeing of the transport, tagging it as "dead". In order to do this,
the patch restores the "dead" bit in struct sctp_transport, which was
removed in
commit 47faa1e4c50e ("sctp: remove the dead field of sctp_transport").
Then, in the scenario where the sender thread has released the socket
lock in sctp_wait_for_sndbuf(), the bit is checked again after
re-acquiring the socket lock to detect the deletion. This is done while
holding a reference to the transport to prevent it from being freed in
the process.
If the transport was deleted while the socket lock was relinquished,
sctp_sendmsg_to_asoc() will return -EAGAIN to let userspace retry the
send.
The bug was found by a private syzbot instance (see the error report [1]
and the C reproducer that triggers it [2]).
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_sendmsg未检测释放的传输引用，可能导致释放后重用。
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-2025-23142 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-23142 补丁与修复 (8)
CVE-2025-23142 其他参考 (1)
同批安全公告 · Linux · 2025-05-01 · 共 245 条
| CVE-2025-37750 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37778 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49770 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49931 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37777 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49910 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49886 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23159 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37749 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37774 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37789 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37779 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49919 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37756 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37761 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37763 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49804 | 7.8 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2025-23142
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