watchdog: Fix possible use-after-free by calling del_timer_sync() (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d
- https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f
- https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270
- https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a
- https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111
- https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4
- https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e
- https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3
- https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-34326
- GCVE · GCVE-0-2021-47321
CERT-FR advisories
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0021 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0925 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0821 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0526 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0496 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 4.4.276cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.5 < 4.9.276cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.240cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.198cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.134cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.52cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.12.9cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.13 < 5.13.4
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 58606882ad8ec6c39e0f40344b922921ef94ab4d ; affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < ca96b8ea5e74956071154bdb456778cc3027e79f ; affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 8bec568d7518b1504a602ed5376bb322e4dbb270 ; affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < ecd620e0fb1ff7f78fdb593379b2e6938c99707a ; affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < db222f1477ad5692cd454709b714949807e5d111 ; affected 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 |
| Linux · Linux | affected 4.3 ; unaffected 0 < 4.3 ; unaffected 4.4.276 ≤ 4.4.* ; unaffected 4.9.276 ≤ 4.9.* ; unaffected 4.14.240 ≤ 4.14.* ; unaffected 4.19.198 ≤ 4.19.* |
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 |