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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-38352 Detail

Description

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.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff kernel.org Patch 
https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b kernel.org Patch 
https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b kernel.org Patch 
https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb kernel.org Patch 
https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200 kernel.org Patch 
https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b kernel.org Patch 
https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7 kernel.org Patch 
https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca kernel.org Patch 

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name Date Added Due Date Required Action
Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability 09/04/2025 09/25/2025 Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-38352
NVD Published Date:
07/22/2025
NVD Last Modified:
09/05/2025
Source:
kernel.org