CVE-2025-38352

High KEV — Actively Exploited

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.

Package Linux Kernel
Published 2025-07-22
Last modified 2026-01-08
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.4

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-367

CVE-2025-38352 is classified as CWE-367

See CWE-367 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 2.6.36 and later are affected. Fixed in 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3, 6.16 and their respective stable series.

Affected from
≥ 2.6.36
Fixed in
✓ 5.4.295 5.4.x ✓ 5.10.239 5.10.x ✓ 5.15.186 5.15.x ✓ 6.1.142 6.1.x ✓ 6.6.94 6.6.x ✓ 6.12.34 6.12.x ✓ 6.15.3 6.15.x ✓ 6.16

References

The following references provide additional information about CVE-2025-38352 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

8 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-38352?

    CVE-2025-38352 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10 . It affects Linux kernel versions from 2.6.36 onward and has been patched in 5.4.295, 5.10.239, 5.15.186 and others. CVE-2025-38352 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild.

  • What is the CVSS score for CVE-2025-38352?

    CVE-2025-38352 has a CVSS score of 7.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2025-38352?

    Yes — CVE-2025-38352 has been patched. Fixed versions include 5.4.295, 5.10.239, 5.15.186 and others. If you are running Linux kernel 2.6.36 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-38352 actively exploited?

    Yes — CVE-2025-38352 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. It carries a CVSS score of 7.4 (High severity).

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