In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: fix race between handle_posix_cpu_timers() and… (CVE-2025-38352)
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.
AI Analysis
Technical Summary
CVE-2025-38352 is a race condition vulnerability in the Linux kernel's posix-cpu-timers code, involving a race between handle_posix_cpu_timers() and posix_cpu_timer_del(). This flaw could potentially lead to unintended behavior in the kernel timer handling. Red Hat has issued a security advisory (RHSA-2025:15662) addressing this issue with a kernel update for Red Hat Enterprise Linux 10 and its extended update support versions. The advisory recommends applying the update and rebooting the system to mitigate the vulnerability.
Potential Impact
The vulnerability affects the Linux kernel's core timer handling functionality, which could impact system stability or security due to the race condition. The severity is rated as Important by Red Hat Product Security. No known exploits in the wild have been reported. The impact is limited to affected Red Hat Enterprise Linux 10 systems and related variants.
Mitigation Recommendations
Red Hat has released an official kernel update that fixes the race condition vulnerability. Users should apply the update as described in the Red Hat advisory RHSA-2025:15662 and reboot affected systems to ensure the patch takes effect. No additional mitigation steps are required beyond applying the official update and rebooting.
In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: fix race between handle_posix_cpu_timers() and… (CVE-2025-38352)
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.
CVSS v3.1
Score 7.8high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-38352 is a race condition vulnerability in the Linux kernel's posix-cpu-timers code, involving a race between handle_posix_cpu_timers() and posix_cpu_timer_del(). This flaw could potentially lead to unintended behavior in the kernel timer handling. Red Hat has issued a security advisory (RHSA-2025:15662) addressing this issue with a kernel update for Red Hat Enterprise Linux 10 and its extended update support versions. The advisory recommends applying the update and rebooting the system to mitigate the vulnerability.
Potential Impact
The vulnerability affects the Linux kernel's core timer handling functionality, which could impact system stability or security due to the race condition. The severity is rated as Important by Red Hat Product Security. No known exploits in the wild have been reported. The impact is limited to affected Red Hat Enterprise Linux 10 systems and related variants.
Mitigation Recommendations
Red Hat has released an official kernel update that fixes the race condition vulnerability. Users should apply the update as described in the Red Hat advisory RHSA-2025:15662 and reboot affected systems to ensure the patch takes effect. No additional mitigation steps are required beyond applying the official update and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:15662
- Cve Count
- 1
Threat ID: 6a3da1e44853345fc182cfaa
Added to database: 06/25/2026, 21:47:16 UTC
Last enriched: 06/25/2026, 22:31:37 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 52
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.