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CVE-2025-38352
Linux Kernel POSIX CPU Timers Race Condition Vulnerability
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.

INFO

Published Date :

July 22, 2025, 8:15 a.m.

Last Modified :

July 22, 2025, 1:05 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-38352 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
This information is provided by the 3rd party feeds.
  • Upgrade the affs-modules-6.1.0-37-4kc-malta-di packages.
Public PoC/Exploit Available at Github

CVE-2025-38352 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-38352.

URL Resource
https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-38352 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-38352 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
w4zu/Debian_security

DSA and DLA for Debian last 14 days

Python

Updated: 6 hours, 31 minutes ago
0 stars 0 fork 0 watcher
Born at : Feb. 12, 2025, 2:08 p.m. This repo has been linked 381 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-38352 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-38352 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 22, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
    Added Reference https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
    Added Reference https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
    Added Reference https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
    Added Reference https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
    Added Reference https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
    Added Reference https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
    Added Reference https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.