- 7.8HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 92% 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: f2fs: fix KMSAN uninit-value in extent_info usage KMSAN reported a use of uninitialized value in `__is_extent_mergeable()` and `__is_back_mergeable()` via the read extent tree path. The root cause is that `get_read_extent_info()` only initializes three fields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the remaining fields uninitialized. This leads to undefined behavior when those fields are accessed later, especially during extent merging. Fix it by zero-initializing the `extent_info` struct before population.
Timeline
ID reserved
By Linux
- 4 months later
· 4 months later
Published
- 12 months later
· 12 months 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 92% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < 08e8ab00a6d20d5544c932ee85a297d833895141
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < e68b751ec2b15d866967812c57cfdfc1eba6a269
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < 44a79437309e0ee2276ac17aaedc71253af253a8
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < cc1615d5aba4f396cf412579928539a2b124c8a0
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < 01b6f5955e0008af6bc3a181310d2744bb349800
- affected 94afd6d6e5253179c9b891d02081cc8355a11768 – < 154467f4ad033473e5c903a03e7b9bca7df9a0fa
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.190 – ≤ 5.15.*
- unaffected 6.1.148 – ≤ 6.1.*
- unaffected 6.6.102 – ≤ 6.6.*
- unaffected 6.12.42 – ≤ 6.12.*
- unaffected 6.15.10 – ≤ 6.15.*
- unaffected 6.16.1 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References8
- https://git.kernel.org/stable/c/08e8ab00a6d20d5544c932ee85a297d833895141 (opens in a new tab)
- https://git.kernel.org/stable/c/e68b751ec2b15d866967812c57cfdfc1eba6a269 (opens in a new tab)
- https://git.kernel.org/stable/c/dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898 (opens in a new tab)
- https://git.kernel.org/stable/c/44a79437309e0ee2276ac17aaedc71253af253a8 (opens in a new tab)
- https://git.kernel.org/stable/c/cc1615d5aba4f396cf412579928539a2b124c8a0 (opens in a new tab)
- https://git.kernel.org/stable/c/01b6f5955e0008af6bc3a181310d2744bb349800 (opens in a new tab)
- https://git.kernel.org/stable/c/154467f4ad033473e5c903a03e7b9bca7df9a0fa (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
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-2025-26097 (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-2025-38579)Record last updated .