CVE-2021-47254
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6948c6bc17d666663a84c124b3176039e64a58f4 | affected | git | 38ce329534500bf4ae71f81df6a37a406cf187b4 | Unavailable | None listed |
| b568ed385a18c0ddbe41862b69088b636550a04f | affected | git | 92869945cc5b78ee8a1ef90336fe070893e3458a | Unavailable | None listed |
| 762bb3528249604bc680a9df635e8995740176de | affected | git | 0364742decb0f02bc183404868b82896f7992595 | Unavailable | None listed |
| bac8520892812dada1ac93f27d96317470d24b1f | affected | git | 094bf5670e762afa243d2c41a5c4ab71c7447bf4 | Unavailable | None listed |
| 7881ef3f33bb80f459ea6020d1e021fc524a6348 | affected | git | 86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d | Unavailable | None listed |
| 7881ef3f33bb80f459ea6020d1e021fc524a6348 | affected | git | a61156314b66456ab6a291ed5deba1ebd002ab3c | Unavailable | None listed |
| 7881ef3f33bb80f459ea6020d1e021fc524a6348 | affected | git | e87ef30fe73e7e10d2c85bdcc778dcec24dca553 | Unavailable | None listed |
| 7881ef3f33bb80f459ea6020d1e021fc524a6348 | affected | git | 1ab19c5de4c537ec0d9b21020395a5b5a6c059b2 | Unavailable | None listed |
| 1e7a416fb765c9072479dc424780c0937ba99270 | affected | git | Unavailable | Unavailable | None listed |
| dcbdbe13796ffa561510d2686a6318564e728bbd | affected | git | Unavailable | Unavailable | None listed |
| 4.4.181 | affected | semver | 4.4.274 | Unavailable | None listed |
| 4.9.180 | affected | semver | 4.9.274 | Unavailable | None listed |
| 4.14.123 | affected | semver | 4.14.238 | Unavailable | None listed |
| 4.19.47 | affected | semver | 4.19.196 | Unavailable | None listed |
| 5.0.20 | affected | semver | 5.1 | Unavailable | None listed |
| 5.1.6 | affected | semver | 5.2 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.2 | Unavailable | None listed |
| 4.4.274 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.274 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.238 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.196 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.127 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.45 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.12 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |