{"id":"CVE-2026-89609","title":"kernel: ecryptfs: hold msg ctx list lock when cleaning daemon queue (CVE-2026-89609)","summary":"A flaw was found in the eCryptfs component of the Linux kernel. A race condition occurs during the cleanup of the daemon message queue because a required lock is not held. This can lead to unpredictable system behavior or instability due t…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-820","vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","affected":["enterprise_linux 6"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T22:15:29+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json","references":[{"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"},{"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"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00176,"epssPercentile":0.07355,"scores":{"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89609","body":"## Overview\n\nA flaw was found in the eCryptfs component of the Linux kernel. A race condition occurs during the cleanup of the daemon message queue because a required lock is not held. This can lead to unpredictable system behavior or instability due to concurrent access to shared message context lists.\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)\n\n**kernel: ecryptfs: hold msg ctx list lock when cleaning daemon queue** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nAffected:\n\n- Red Hat Enterprise Linux 6\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"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"}]}