{"id":"CVE-2026-89609","title":"ecryptfs: hold msg ctx list lock when cleaning daemon queue","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\necryptfs: hold msg ctx list lock when cleaning daemon queue\n\necryptfs_exorcise_daemon() drops queued messages from a dying daemon\nwithout holding ecryptfs_msg_ctx_lists…","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","cvssSource":"cna","cwe":["CWE-820"],"vendor":"Linux","product":"Linux","affected":["Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 64d8998e36cfd2bb7114f3af0aa51c5a559a39b3","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4d50b8aea11ad9594c8704a4c647e11311ab7b19","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 956541efd125a10442f9514668bc5c852702c93b","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 7e48afafe7abc275f7b6916613bb18b821e7d94a","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 0d9636ecba34bd553ecf19049f7705505aea62fd","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4c02acbe0a2692ca9991c51e62bbe6d6b59dac31","Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 779972513c2fa8c7938e54976f686091dafff22f","Linux 2.6.26"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:49:41.609Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89609","references":[{"url":"https://git.kernel.org/stable/c/64d8998e36cfd2bb7114f3af0aa51c5a559a39b3"},{"url":"https://git.kernel.org/stable/c/4d50b8aea11ad9594c8704a4c647e11311ab7b19"},{"url":"https://git.kernel.org/stable/c/956541efd125a10442f9514668bc5c852702c93b"},{"url":"https://git.kernel.org/stable/c/ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a"},{"url":"https://git.kernel.org/stable/c/7e48afafe7abc275f7b6916613bb18b821e7d94a"},{"url":"https://git.kernel.org/stable/c/0d9636ecba34bd553ecf19049f7705505aea62fd"},{"url":"https://git.kernel.org/stable/c/4c02acbe0a2692ca9991c51e62bbe6d6b59dac31"},{"url":"https://git.kernel.org/stable/c/779972513c2fa8c7938e54976f686091dafff22f"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89609"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532182"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89609"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89609"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89609.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00176,"epssPercentile":0.07081,"scores":{"cna":7.8,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89609","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\necryptfs: hold msg ctx list lock when cleaning daemon queue\n\necryptfs_exorcise_daemon() drops queued messages from a dying daemon\nwithout holding ecryptfs_msg_ctx_lists_mux, but\necryptfs_msg_ctx_alloc_to_free() requires that lock.\n\nTake the list lock while moving the queued contexts back to the free\nlist to avoid racing with other global msg ctx list users.\n\n## Affected\n\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 64d8998e36cfd2bb7114f3af0aa51c5a559a39b3`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4d50b8aea11ad9594c8704a4c647e11311ab7b19`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 956541efd125a10442f9514668bc5c852702c93b`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 7e48afafe7abc275f7b6916613bb18b821e7d94a`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 0d9636ecba34bd553ecf19049f7705505aea62fd`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4c02acbe0a2692ca9991c51e62bbe6d6b59dac31`\n- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 779972513c2fa8c7938e54976f686091dafff22f`\n- `Linux 2.6.26`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224676,"id":"CVE-2026-89609","ts":1792401469067,"field":"cvss","old":"7","new":"7.8"},{"seq":208081,"id":"CVE-2026-89609","ts":1789922706290,"field":"cvss","old":"7.8","new":"7"},{"seq":197861,"id":"CVE-2026-89609","ts":1789384320712,"field":"cvss","old":"5.3","new":"7.8"},{"seq":197860,"id":"CVE-2026-89609","ts":1789384320712,"field":"severity","old":"medium","new":"high"},{"seq":183408,"id":"CVE-2026-89609","ts":1789356675243,"field":"cvss","old":"7.8","new":"5.3"},{"seq":183407,"id":"CVE-2026-89609","ts":1789356675243,"field":"severity","old":"high","new":"medium"},{"seq":153436,"id":"CVE-2026-89609","ts":1789285350505,"field":"cvss","old":null,"new":"7.8"},{"seq":153435,"id":"CVE-2026-89609","ts":1789285350505,"field":"severity","old":"none","new":"high"},{"seq":147602,"id":"CVE-2026-89609","ts":1789270211555,"field":"cvss","old":null,"new":"5.3"},{"seq":147601,"id":"CVE-2026-89609","ts":1789270211555,"field":"severity","old":"none","new":"medium"},{"seq":109358,"id":"CVE-2026-89609","ts":1789183731599,"field":"cvss","old":null,"new":"5.3"},{"seq":109357,"id":"CVE-2026-89609","ts":1789183731599,"field":"severity","old":"none","new":"medium"}]}