CVE-2024-26601ext4: regenerate buddy after block freeing failed if under fc replay
- 7.8HighCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd ("ext4: remove redundant mb_regenerate_buddy()") and reintroduces mb_regenerate_buddy(). Based on code in mb_free_blocks(), fast commit replay can end up marking as free blocks that are already marked as such. This causes corruption of the buddy bitmap so we need to regenerate it in that case.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 0983142c5f17a62055ec851372273c3bc77e4788 – < 94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a
- affected 6bd97bf273bdb4944904e57480f6545bca48ad77 – < c1317822e2de80e78f137d3a2d99febab1b80326
- affected 6bd97bf273bdb4944904e57480f6545bca48ad77 – < 78327acd4cdc4a1601af718b781eece577b6b7d4
- affected 6bd97bf273bdb4944904e57480f6545bca48ad77 – < ea42d6cffb0dd27a417f410b9d0011e9859328cb
- affected 6bd97bf273bdb4944904e57480f6545bca48ad77 – < 6b0d48647935e4b8c7b75d1eccb9043fcd4ee581
- affected 6bd97bf273bdb4944904e57480f6545bca48ad77 – < c9b528c35795b711331ed36dc3dbee90d5812d4e
- affected 5.10.181 – < 5.10.211
- affected 5.11
- unaffected < 5.11
- unaffected 5.10.211 – ≤ 5.10.*
- unaffected 5.15.150 – ≤ 5.15.*
- unaffected 6.1.78 – ≤ 6.1.*
- unaffected 6.6.17 – ≤ 6.6.*
- unaffected 6.7.5 – ≤ 6.7.*
- unaffected 6.8 – ≤ *
References
References7
- https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-23863 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-26601)Record last updated .