{"id":"CVE-2026-89841","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89841","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…","details":"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() 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.","published":"2026-09-16T11:16:50.937","modified":"2026-09-16T11:16:50.937","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/445e4a1e6025ecd5312e9a95c1b234192c976ca1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/85171332742e741ccd6f401c69b6e0d698119e72"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89c65ec3c18903de763cf567c96ab3ef60e5f3b0"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T11:16:50.937"}}