CVE-2024-26686fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats
- 5.5MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 44 days later
· 44 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4fe85bdaabd63f8f8579b24a10ed597c9c482164
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0c35d1914353799c54fa1843fe7dea6fcbcdbac5
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 3820b0fac7732a653bcc6f6ac20c1d72e697f8f6
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 27978243f165b44e342f28f449b91327944ea071
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 7601df8031fd67310af891897ef6cc0df4209305
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.237 – ≤ 5.10.*
- unaffected 5.15.181 – ≤ 5.15.*
- unaffected 6.1.82 – ≤ 6.1.*
- unaffected 6.6.64 – ≤ 6.6.*
- unaffected 6.7.6 – ≤ 6.7.*
- unaffected 6.8 – ≤ *
References
References7
- https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164 (opens in a new tab)
- https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5 (opens in a new tab)
- https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6 (opens in a new tab)
- https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-23948 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-26686)Record last updated .