CVE record · CVE-2026-89834

f2fs: fix to migrate all curseg types during free_segment_range

No CVSS scoreEPSS 0.0022 · 11th percentile

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before 7ffac0deea2d84cf79051f16fed8e215c4bcf0e6 git affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before d358d2fc6be11eefde5eb1286f1c43a6d0330db6 git affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before 3b85edf3391f3e1f624f409a7d2d239885f567b7 git affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before b8ae1228c153622afa71a179c9d4dc268117e0f0 git affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before b9776094aa7118e8e5dfdcd791ffc8330c5ca408 git affected d0b9e42ab6155dc05fc83f00af9f45d4dd02264d to before 8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1 git Other versions: unaffected
Linux	Linux	affected 5.10 unaffected before 5.10 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.110 to 6.12., inclusive semver unaffected 6.18.51 to 6.18., inclusive semver unaffected 7.2.5 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-89834
CNA: Linux
Tags: Linux kernel
Published: 16 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel f2fs filesystem, from 5.10 before the fixes, does not migrate all active in-memory segments when shrinking a filesystem, so later writes can perform out-of-bounds I/O on the truncated storage. The source gives few details on what an attacker needs to trigger this. Upgrade to 6.1.191, 6.6.160, 6.12.110, 6.18.51, or a later release in those series.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0022, the 11th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 16 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.