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CVE-2025-38352

HIGH · CVSS 7.8 · Analyzed

Published: 2025-07-22 · Updated: 2026-09-08 · Source: NVD

Stored catalog record

Source record retrieved 2026-10-28T14:19:27.172832+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.

Vulnerability overview

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.

Patch review priority

Known exploitation: prioritize review

  • CISA KEV lists real-world exploitation.

FIRST EPSS: 1.36% · percentile 71.5 · score date 2026-10-27.

EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗

Severity and scoring

CVSS score
7.8 · HIGH
CVSS version
3.1
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-367

CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.

Known exploitation and remediation

Listed in CISA’s Known Exploited Vulnerabilities catalog.

Affected product
Linux · Kernel
Added to catalog
2025-09-04
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA remediation due date
2025-09-25

CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.

Verify affected versions and patch availability in the vendor advisory before making changes.

Affected products and versions

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 2.6.36

    Before (exclusive): 5.4.295

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 5.5

    Before (exclusive): 5.10.239

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 5.11

    Before (exclusive): 5.15.186

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 5.16

    Before (exclusive): 6.1.142

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 6.2

    Before (exclusive): 6.6.94

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 6.7

    Before (exclusive): 6.12.34

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

    From (inclusive): 6.13

    Before (exclusive): 6.15.3

  • cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*

  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.

Advisories and references

Explore official sources

Read the official NVD record ↗

Explore the CISA catalog ↗

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