gfs2: Fix use-after-free in gfs2_glock_shrink_scan (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.24 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in gfs2_glock_shrink_scan The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put(). On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list. Keep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to ensure correct behavior on both sides - clear GLF_LRU after list_del under lru_lock.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4
- https://git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458a
- https://git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595
- https://git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4
- https://git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d
- https://git.kernel.org/stable/c/a61156314b66456ab6a291ed5deba1ebd002ab3c
- https://git.kernel.org/stable/c/e87ef30fe73e7e10d2c85bdcc778dcec24dca553
- https://git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2
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 | Linux |
| 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 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| 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-2021-33902
- GCVE · GCVE-0-2021-47254
CERT-FR advisories
- CERTFR-2026-AVI-0397 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · 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:*:*:*:*:*:*:*:*≥ 4.4.181 < 4.4.274cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9.180 < 4.9.274cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.14.123 < 4.14.238cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19.47 < 4.19.196cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.0.20 < 5.1cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.1.6 < 5.4.127cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.45cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.12.12cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 6948c6bc17d666663a84c124b3176039e64a58f4 < 38ce329534500bf4ae71f81df6a37a406cf187b4 ; affected b568ed385a18c0ddbe41862b69088b636550a04f < 92869945cc5b78ee8a1ef90336fe070893e3458a ; affected 762bb3528249604bc680a9df635e8995740176de < 0364742decb0f02bc183404868b82896f7992595 ; affected bac8520892812dada1ac93f27d96317470d24b1f < 094bf5670e762afa243d2c41a5c4ab71c7447bf4 ; affected 7881ef3f33bb80f459ea6020d1e021fc524a6348 < 86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d ; affected 7881ef3f33bb80f459ea6020d1e021fc524a6348 < a61156314b66456ab6a291ed5deba1ebd002ab3c |
| Linux · Linux | affected 5.2 ; unaffected 0 < 5.2 ; unaffected 4.4.274 ≤ 4.4.* ; unaffected 4.9.274 ≤ 4.9.* ; unaffected 4.14.238 ≤ 4.14.* ; unaffected 4.19.196 ≤ 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 |