CVE-2025-22077— 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smb客户端netns引用计数不平衡，可能导致内存泄漏和释放后重用。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 906807c734ed219dcb2e7bbfde5c4168ed72a3d0< 8dbf060480236877703bff0106fc984576184d11 |
affected |
127e907e11ccd54b59bb78fc22c43ccb76c71079< f761eeefd531e6550cd3a5c047835b4892acb00d |
affected | ||
e9f2517a3e18a54a3943c098d2226b245d488801< 4b6f6bf1bde8d6045c389fda8d21c304dfe49384 |
affected | ||
e9f2517a3e18a54a3943c098d2226b245d488801< 95d2b9f693ff2a1180a23d7d59acc0c4e72f4c41 |
affected | ||
6.6.68< 6.6.88 |
affected | ||
6.12.7< 6.12.25 |
affected | ||
6.13 |
affected | ||
< 6.13 |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2025-22077 基础信息
漏洞信息
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Vulnerability Title
Revert "smb: client: fix TCP timers deadlock after rmmod"
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
Revert "smb: client: fix TCP timers deadlock after rmmod"
This reverts commit e9f2517a3e18a54a3943c098d2226b245d488801.
Commit e9f2517a3e18 ("smb: client: fix TCP timers deadlock after
rmmod") is intended to fix a null-ptr-deref in LOCKDEP, which is
mentioned as CVE-2024-54680, but is actually did not fix anything;
The issue can be reproduced on top of it. [0]
Also, it reverted the change by commit ef7134c7fc48 ("smb: client:
Fix use-after-free of network namespace.") and introduced a real
issue by reviving the kernel TCP socket.
When a reconnect happens for a CIFS connection, the socket state
transitions to FIN_WAIT_1. Then, inet_csk_clear_xmit_timers_sync()
in tcp_close() stops all timers for the socket.
If an incoming FIN packet is lost, the socket will stay at FIN_WAIT_1
forever, and such sockets could be leaked up to net.ipv4.tcp_max_orphans.
Usually, FIN can be retransmitted by the peer, but if the peer aborts
the connection, the issue comes into reality.
I warned about this privately by pointing out the exact report [1],
but the bogus fix was finally merged.
So, we should not stop the timers to finally kill the connection on
our side in that case, meaning we must not use a kernel socket for
TCP whose sk->sk_net_refcnt is 0.
The kernel socket does not have a reference to its netns to make it
possible to tear down netns without cleaning up every resource in it.
For example, tunnel devices use a UDP socket internally, but we can
destroy netns without removing such devices and let it complete
during exit. Otherwise, netns would be leaked when the last application
died.
However, this is problematic for TCP sockets because TCP has timers to
close the connection gracefully even after the socket is close()d. The
lifetime of the socket and its netns is different from the lifetime of
the underlying connection.
If the socket user does not maintain the netns lifetime, the timer could
be fired after the socket is close()d and its netns is freed up, resulting
in use-after-free.
Actually, we have seen so many similar issues and converted such sockets
to have a reference to netns.
That's why I converted the CIFS client socket to have a reference to
netns (sk->sk_net_refcnt == 1), which is somehow mentioned as out-of-scope
of CIFS and technically wrong in e9f2517a3e18, but **is in-scope and right
fix**.
Regarding the LOCKDEP issue, we can prevent the module unload by
bumping the module refcount when switching the LOCKDDEP key in
sock_lock_init_class_and_name(). [2]
For a while, let's revert the bogus fix.
Note that now we can use sk_net_refcnt_upgrade() for the socket
conversion, but I'll do so later separately to make backport easy.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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smb客户端netns引用计数不平衡，可能导致内存泄漏和释放后重用。
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-2025-22077 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-22077 补丁与修复 (5)
同批安全公告 · Linux · 2025-04-16 · 共 127 条
| CVE-2025-22021 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22088 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22110 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22039 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22086 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23133 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-58096 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22041 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22040 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22074 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22118 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22117 | 8.7 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22108 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22121 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22080 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22038 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22043 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22042 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22085 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22045 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 127 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-22077
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