CVE-2026-89834f2fs: fix to migrate all curseg types during free_segment_range
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d0b9e42ab6155dc05fc83f00af9f45d4dd02264d before 3b85edf3391f3e1f624f409a7d2d239885f567b7; from d0b9e42ab6155dc05fc83f00af9f45d4dd02264d before b8ae1228c153622afa71a179c9d4dc268117e0f0; from d0b9e42ab6155dc05fc83f00af9f45d4dd02264d before b9776094aa7118e8e5dfdcd791ffc8330c5ca408; from d0b9e42ab6155dc05fc83f00af9f45d4dd02264d before 8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1 | CNA record |
References
- https://git.kernel.org/stable/c/3b85edf3391f3e1f624f409a7d2d239885f567b7
- https://git.kernel.org/stable/c/b8ae1228c153622afa71a179c9d4dc268117e0f0
- https://git.kernel.org/stable/c/b9776094aa7118e8e5dfdcd791ffc8330c5ca408
- https://git.kernel.org/stable/c/8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.