peter bassill · operator
$ cve CVE-2025-38352 JSON

CVE-2025-38352 KEV

7.8
HIGH · CVSS 3.1 · EPSS 1.3% (pctl 69)

Patch first

On CISA KEV — known exploited in the wild, due 2025-09-25.

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.

Scoring

CVSS7.8 (HIGH, v3.1)
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS1.29% — more likely to be exploited than 69% of all CVEs
WeaknessCWE-367
On CISA KEVyes — remediate by 2025-09-25
Public exploitnone known
Published2025-07-22
Last modified2026-09-08

CISA KEV

NameLinux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability
Added2025-09-04
Due2025-09-25
Vendor / productLinux / Kernel
Ransomware usenone reported

Affected (2)

VendorProduct
debiandebian linux
linuxlinux kernel

References

→ the Explorer  ·  watch your stack  ·  NVD