Linux · Kernel
CVE-2025-38352
posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()
ما هي
In the Linux kernel, the following vulnerability has been resolved:
posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()
If an exiting non-autoreaping task has already passed exit_notify() and
calls handle_posix_cpu_timers() from IRQ, it can be reaped by its parent
or debugger right after unlock_task_sighand().
If a concurrent posix_cpu_timer_del() runs at that moment, it won't be
able to detect timer->it.cpu.firing != 0: cpu_timer_task_rcu() and/or
lock_task_sighand() will fail.
Add the tsk->exit_state check into run_posix_cpu_timers() to fix this.
This fix is not needed if CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y, because
exit_task_work() is called before exit_notify(). But the check still
makes sense, task_work_add(&tsk->posix_cputimers_work.work) will fail
anyway in this case.
CISA: Linux kernel contains a time-of-check time-of-use (TOCTOU) race condition vulnerability that has a high impact on confidentiality, integrity, and availability.
ما العمل
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
الموعد النهائي للوكالات الفدرالية الأمريكية: 25 سبتمبر 2025
- أُضيفت إلى قائمة CISA
- 4 سبتمبر 2025
- نُشرت
- 22 يوليو 2025
- الخطورة
- مرتفع 7.8 CVSS 3.1
- احتمال الهجمات خلال الأيام الـ30 القادمة (EPSS)
- 1.4% ضمن أعلى 28.5% من كل الثغرات المعروفة
- نوع الضعف
- CWE-367
- تفاصيل أكثر
- NVD · CVE.org · CISA
كل المراجع (8)
- https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
- https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
- https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
- https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
- https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
- https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
- https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
- https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
ثغرات مُستغلّة أخرى من Linux
| أُضيفت | الثغرة | المنتج | الخطورة | احتمال الهجوم |
|---|---|---|---|---|
| 18/09/2026 | Improper Check for Unusual or Exceptional Conditions | Kernel | حرجة 9.8 | 3.3% |
| 18/09/2026 | Race Condition | Kernel | مرتفع 7.8 | 1.6% |
| 18/09/2026 | Out-of-Bounds Write | Kernel | مرتفع 8.8 | 0.9% |
| 27/08/2026 | Unspecified | Kernel | مرتفع 7.8 | 0.7% |
| 26/08/2026 | Out-of-Bounds Write | Kernel | مرتفع 7.8 | 8.9% |
| 02/06/2026 | Improper Authentication | Kernel | مرتفع 7.8 | 5.5% |
| 01/05/2026 | Incorrect Resource Transfer Between Spheres | Kernel | مرتفع 7.8 | 98% |
| 26/01/2026 | Integer Overflow | Kernel | مرتفع 7.8 | 15% |
المصادر: Known Exploited Vulnerabilities (CISA، ملكية عامة)، وCVE records (cve.org)، وEPSS (FIRST). احتمال الهجوم هو تقدير EPSS لاحتمال أن يحاول أحد استغلال الثغرة خلال الأيام الـ30 القادمة.