CVE-2026-89834f2fs: fix to migrate all curseg types during free_segment_range
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 88% 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 to migrate all curseg types during free_segment_range In free_segment_range(), the curseg evacuation loop only iterates up to NR_CURSEG_PERSIST_TYPE (0..5), missing non-persistent in-memory curseg types such as CURSEG_COLD_DATA_PINNED and CURSEG_ALL_DATA_ATGC. Even though these in-memory curseg types are not saved in the on-disk checkpoint header, they still occupy active physical segments at runtime. If an active in-memory curseg happens to be allocated within the segment range being truncated during filesystem shrink, failing to evacuate it will cause subsequent writes to the curseg attempting out-of-bounds I/O on the truncated storage range. Fix this by expanding the curseg evacuation loop upper bound to NR_CURSEG_TYPE to ensure all active curseg types are safely migrated out of the target range.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 44 days later
· 44 days 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 88% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < 7ffac0deea2d84cf79051f16fed8e215c4bcf0e6
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < d358d2fc6be11eefde5eb1286f1c43a6d0330db6
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < 3b85edf3391f3e1f624f409a7d2d239885f567b7
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < b8ae1228c153622afa71a179c9d4dc268117e0f0
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < b9776094aa7118e8e5dfdcd791ffc8330c5ca408
- affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d – < 8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1
- affected 5.10
- unaffected < 5.10
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/7ffac0deea2d84cf79051f16fed8e215c4bcf0e6 (opens in a new tab)
- https://git.kernel.org/stable/c/d358d2fc6be11eefde5eb1286f1c43a6d0330db6 (opens in a new tab)
- https://git.kernel.org/stable/c/3b85edf3391f3e1f624f409a7d2d239885f567b7 (opens in a new tab)
- https://git.kernel.org/stable/c/b8ae1228c153622afa71a179c9d4dc268117e0f0 (opens in a new tab)
- https://git.kernel.org/stable/c/b9776094aa7118e8e5dfdcd791ffc8330c5ca408 (opens in a new tab)
- https://git.kernel.org/stable/c/8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1 (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-2026-80434 (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-2026-89834)Record last updated .