{"id":"CVE-2026-89841","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: only redirty pinned folios in redirty_blocks\n\nredirty_blocks() pins folios with read_cache_folio() and then walks the\nsame range again with filemap_lock_folio() t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: only redirty pinned folios in redirty_blocks\n\nredirty_blocks() pins folios with read_cache_folio() and then walks the\nsame range again with filemap_lock_folio() t…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 5951fee46befbf6176c86482432f4f76e522f16c < 445e4a1e6025ecd5312e9a95c1b234192c976ca1","Linux >= 5951fee46befbf6176c86482432f4f76e522f16c < 89c65ec3c18903de763cf567c96ab3ef60e5f3b0","Linux >= 5951fee46befbf6176c86482432f4f76e522f16c < 85171332742e741ccd6f401c69b6e0d698119e72","Linux 6.16"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:12.597","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89841","references":[{"url":"https://git.kernel.org/stable/c/445e4a1e6025ecd5312e9a95c1b234192c976ca1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/85171332742e741ccd6f401c69b6e0d698119e72","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/89c65ec3c18903de763cf567c96ab3ef60e5f3b0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.997Z","epss":0.00161,"epssPercentile":0.0577,"slug":"CVE-2026-89841","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: only redirty pinned folios in redirty_blocks\n\nredirty_blocks() pins folios with read_cache_folio() and then walks the\nsame range again with filemap_lock_folio() to redirty them and drop the\nreferences it took.\n\nCommit 5951fee46bef (\"f2fs: Use a folio in redirty_blocks()\") changed\nthe second pass to a do/while loop. If read_cache_folio() fails before\nanything is pinned, page_idx does not advance but the cleanup loop still\nruns once.\n\nIf readahead has already populated the failed folio in page cache, that\nextra iteration finds it and folio_put_refs(folio, 2) drops one\nreference too many. Later drop_caches or reclaim can then report\n\"BUG: Bad page state\".\n\nOnly redirty the range that was pinned successfully.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205208,"id":"CVE-2026-89841","ts":1789570705733,"field":"cvss","old":null,"new":"7.8"},{"seq":205207,"id":"CVE-2026-89841","ts":1789570705733,"field":"severity","old":"none","new":"high"}]}