CVE-2024-26686
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup.
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5
- https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Patch
- https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6Patch
- https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164
- https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Patch
- https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dPatch
- https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Patch
- https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Patch
- https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dPatch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.