{"id":"CVE-2026-64551","title":"kernel: sctp: validate STALE_COOKIE cause length before reading staleness (CVE-2026-64551)","summary":"A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP). This vulnerability allows a remote attacker or a local unprivileged user to potentially access and disclose sensitive information. By sending a malformed e…","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-125","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9"],"published":"2026-07-27","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:18:40+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64551.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64551.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-64551"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507746"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64551"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64551"},{"url":"https://lore.kernel.org/linux-cve-announce/2026072737-CVE-2026-64551-1deb@gregkh/T"},{"url":"https://git.kernel.org/stable/c/6022da37786701df1fc5dd946a6dcba59d5473b1"},{"url":"https://git.kernel.org/stable/c/861f884f5471632c731cbbd612a1c072e391a624"},{"url":"https://git.kernel.org/stable/c/588706ebaf8cdb4a4161602949eba365514b1db1"},{"url":"https://git.kernel.org/stable/c/a257b41ddfe9e327b26581ad2777f04b23ac73f5"},{"url":"https://git.kernel.org/stable/c/08a8f2d13f703924316e9aeac863a88ef50990c7"},{"url":"https://git.kernel.org/stable/c/ebe0a55d954fa8da383b6192edb8f763dcb002d5"},{"url":"https://git.kernel.org/stable/c/bbd6b2ea966cf57b6ae095cf5a8dbc993cd197a0"},{"url":"https://git.kernel.org/stable/c/1cd23ca80784223fa2204e16203f754da4e821f8"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00514,"epssPercentile":0.43611,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T15:42:25.961430Z"},"scores":{"vendor":7,"cna":9.1},"ingestedAt":"2026-10-16T17:24:46.833Z","slug":"CVE-2026-64551","body":"## Overview\n\nA flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP). This vulnerability allows a remote attacker or a local unprivileged user to potentially access and disclose sensitive information. By sending a malformed error message, the system can be tricked into reading and then leaking uninitialized memory, which is then sent back to the attacker.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64551.json)\n\n**kernel: sctp: validate STALE_COOKIE cause length before reading staleness** — rated Moderate by Red Hat. Released 2026-07-27, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":228070,"id":"CVE-2026-64551","ts":1792758068167,"field":"cvss","old":"9.1","new":"7"},{"seq":228069,"id":"CVE-2026-64551","ts":1792758068167,"field":"severity","old":"critical","new":"high"}]}