HIGH 7.8 NVD
CVE-2026-89841
In the Linux kernel, the following vulnerability has been resolved: f2fs: only redirty pinned folios in redirty_blocks redirty_blocks() pins folios with read_
In the Linux kernel, the following vulnerability has been resolved:
f2fs: only redirty pinned folios in redirty_blocks
redirty_blocks() pins folios with read_cache_folio() and then walks the
same range again with filemap_lock_folio() to redirty them and drop the
references it took.
Commit 5951fee46bef ("f2fs: Use a folio in redirty_blocks()") changed
the second pass to a do/while loop. If read_cache_folio() fails before
anything is pinned, page_idx does not advance but the cleanup loop still
runs once.
If readahead has already populated the failed folio in page cache, that
extra iteration finds it and folio_put_refs(folio, 2) drops one
reference too many. Later drop_caches or reclaim can then report
"BUG: Bad page state".
Only redirty the range that was pinned successfully.
References
- https://git.kernel.org/stable/c/445e4a1e6025ecd5312e9a95c1b234192c976ca1
- https://git.kernel.org/stable/c/85171332742e741ccd6f401c69b6e0d698119e72
- https://git.kernel.org/stable/c/89c65ec3c18903de763cf567c96ab3ef60e5f3b0
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-16 via NVD.
vulnfeed aggregates 14391 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.