signal: restore the override_rlimit logic (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.23 % · percentile 14 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: signal: restore the override_rlimit logic Prior to commit d64696905554 ("Reimplement RLIMIT_SIGPENDING on top of ucounts") UCOUNT_RLIMIT_SIGPENDING rlimit was not enforced for a class of signals. However now it's enforced unconditionally, even if override_rlimit is set. This behavior change caused production issues. For example, if the limit is reached and a process receives a SIGSEGV signal, sigqueue_alloc fails to allocate the necessary resources for the signal delivery, preventing the signal from being delivered with siginfo. This prevents the process from correctly identifying the fault address and handling the error. From the user-space perspective, applications are unaware that the limit has been reached and that the siginfo is effectively 'corrupted'. This can lead to unpredictable behavior and crashes, as we observed with java applications. Fix this by passing override_rlimit into inc_rlimit_get_ucounts() and skip the comparison to max there if override_rlimit is set. This effectively restores the old behavior.
Weaknesses (CWE)
- CWE-770 — Allocation of Resources Without Limits or Throttling
References
- https://git.kernel.org/stable/c/012f4d5d25e9ef92ee129bd5aa7aa60f692681e1
- https://git.kernel.org/stable/c/4877d9b2a2ebad3ae240127aaa4cb8258b145cf7
- https://git.kernel.org/stable/c/0208ea17a1e4456fbfe555f13ae5c28f3d671e40
- https://git.kernel.org/stable/c/9e05e5c7ee8758141d2db7e8fea2cab34500c6ed
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2024-44773
- GCVE · GCVE-0-2024-50271
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0366 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0349 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0185 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0152 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1102 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1031 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.14 < 6.1.117cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.61cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.11.8cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected d64696905554e919321e31afc210606653b8f6a4 < 012f4d5d25e9ef92ee129bd5aa7aa60f692681e1 ; affected d64696905554e919321e31afc210606653b8f6a4 < 4877d9b2a2ebad3ae240127aaa4cb8258b145cf7 ; affected d64696905554e919321e31afc210606653b8f6a4 < 0208ea17a1e4456fbfe555f13ae5c28f3d671e40 ; affected d64696905554e919321e31afc210606653b8f6a4 < 9e05e5c7ee8758141d2db7e8fea2cab34500c6ed |
| Linux · Linux | affected 5.14 ; unaffected 0 < 5.14 ; unaffected 6.1.117 ≤ 6.1.* ; unaffected 6.6.61 ≤ 6.6.* ; unaffected 6.11.8 ≤ 6.11.* ; unaffected 6.12 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |