CVE-2024-26686 (GCVE-0-2024-26686)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:54 – Updated: 2026-05-11 20:02
VLAI
Title
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats
Summary
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-03 18:03 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4fe85bdaabd63f8f8579b24a10ed597c9c482164 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0c35d1914353799c54fa1843fe7dea6fcbcdbac5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3820b0fac7732a653bcc6f6ac20c1d72e697f8f6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 27978243f165b44e342f28f449b91327944ea071 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7601df8031fd67310af891897ef6cc0df4209305 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.237 , ≤ 5.10.* (semver)
Unaffected: 5.15.181 , ≤ 5.15.* (semver)
Unaffected: 6.1.82 , ≤ 6.1.* (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.