CVE-2025-71126— 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，该漏洞源于回退时锁获取不当，可能导致死锁。
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking影响版本矩阵 17
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 5586518bec27666c747cd52aabb62d485686d0bf< 0107442e82c0f8d6010e07e6030741c59c520d6e |
affected |
75a4c9ab8a7af0d76b31ccd1188ed178c38b35d2< 252892d5a6a2f163ce18f32716e46fa4da7d4e79 |
affected | ||
54999dea879fecb761225e28f274b40662918c30< 0ca9fb4335e726dab4f23b3bfe87271d8f005f41 |
affected | ||
f8a1d9b18c5efc76784f5a326e905f641f839894< 50f47c02be419bf0a3ae94c118addf67beef359f |
affected | ||
f8a1d9b18c5efc76784f5a326e905f641f839894< ffb8c27b0539dd90262d1021488e7817fae57c42 |
affected | ||
1d82a8fe6ee4afdc92f4e8808c9dad2a6095bbc5 |
affected | ||
6.1.149< 6.1.160 |
affected | ||
6.6.101< 6.6.120 |
affected | ||
| … +9 条更多 | |||
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一、 漏洞 CVE-2025-71126 基础信息
漏洞信息
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Vulnerability Title
mptcp: avoid deadlock on fallback while reinjecting
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: avoid deadlock on fallback while reinjecting
Jakub reported an MPTCP deadlock at fallback time:
WARNING: possible recursive locking detected
6.18.0-rc7-virtme #1 Not tainted
--------------------------------------------
mptcp_connect/20858 is trying to acquire lock:
ff1100001da18b60 (&msk->fallback_lock){+.-.}-{3:3}, at: __mptcp_try_fallback+0xd8/0x280
but task is already holding lock:
ff1100001da18b60 (&msk->fallback_lock){+.-.}-{3:3}, at: __mptcp_retrans+0x352/0xaa0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&msk->fallback_lock);
lock(&msk->fallback_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by mptcp_connect/20858:
#0: ff1100001da18290 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg+0x114/0x1bc0
#1: ff1100001db40fd0 (k-sk_lock-AF_INET#2){+.+.}-{0:0}, at: __mptcp_retrans+0x2cb/0xaa0
#2: ff1100001da18b60 (&msk->fallback_lock){+.-.}-{3:3}, at: __mptcp_retrans+0x352/0xaa0
stack backtrace:
CPU: 0 UID: 0 PID: 20858 Comm: mptcp_connect Not tainted 6.18.0-rc7-virtme #1 PREEMPT(full)
Hardware name: Bochs, BIOS Bochs 01/01/2011
Call Trace:
<TASK>
dump_stack_lvl+0x6f/0xa0
print_deadlock_bug.cold+0xc0/0xcd
validate_chain+0x2ff/0x5f0
__lock_acquire+0x34c/0x740
lock_acquire.part.0+0xbc/0x260
_raw_spin_lock_bh+0x38/0x50
__mptcp_try_fallback+0xd8/0x280
mptcp_sendmsg_frag+0x16c2/0x3050
__mptcp_retrans+0x421/0xaa0
mptcp_release_cb+0x5aa/0xa70
release_sock+0xab/0x1d0
mptcp_sendmsg+0xd5b/0x1bc0
sock_write_iter+0x281/0x4d0
new_sync_write+0x3c5/0x6f0
vfs_write+0x65e/0xbb0
ksys_write+0x17e/0x200
do_syscall_64+0xbb/0xfd0
entry_SYSCALL_64_after_hwframe+0x4b/0x53
RIP: 0033:0x7fa5627cbc5e
Code: 4d 89 d8 e8 14 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa
RSP: 002b:00007fff1fe14700 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa5627cbc5e
RDX: 0000000000001f9c RSI: 00007fff1fe16984 RDI: 0000000000000005
RBP: 00007fff1fe14710 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff1fe16920
R13: 0000000000002000 R14: 0000000000001f9c R15: 0000000000001f9c
The packet scheduler could attempt a reinjection after receiving an
MP_FAIL and before the infinite map has been transmitted, causing a
deadlock since MPTCP needs to do the reinjection atomically from WRT
fallback.
Address the issue explicitly avoiding the reinjection in the critical
scenario. Note that this is the only fallback critical section that
could potentially send packets and hit the double-lock.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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，该漏洞源于回退时锁获取不当，可能导致死锁。
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-2025-71126 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-01-14 · 共 43 条
| CVE-2025-71116 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71112 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71130 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71120 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71128 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71131 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71132 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71136 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71109 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71127 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71122 | Linux kernel 安全漏洞 | |
| CVE-2025-71111 | Linux kernel 安全漏洞 | |
| CVE-2025-71110 | Linux kernel 安全漏洞 | |
| CVE-2025-71113 | Linux kernel 安全漏洞 | |
| CVE-2025-71114 | Linux kernel 安全漏洞 | |
| CVE-2025-71115 | Linux kernel 安全漏洞 | |
| CVE-2025-71103 | Linux kernel 安全漏洞 | |
| CVE-2025-71117 | Linux kernel 安全漏洞 | |
| CVE-2025-71118 | Linux kernel 安全漏洞 | |
| CVE-2025-71102 | Linux kernel 安全漏洞 |
显示前 20 条，共 43 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-71126
匿名用户
2026-01-15 06:08:15Zaproxy alias impedit expedita quisquam pariatur exercitationem. Nemo rerum eveniet dolores rem quia dignissimos.