{"id":"CVE-2026-89592","title":"kernel: accel/rocket: fix NULL dereference and integer overflow in rocket_job_push() (CVE-2026-89592)","summary":"A flaw was found in the `accel/rocket` component of the Linux kernel. This vulnerability arises from two issues: a missing null check after a memory allocation failure and an integer overflow when calculating memory requirements based on u…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-476","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:31:57+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89592.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89592.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89592"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532166"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89592"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89592"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89592.mbox"},{"url":"https://git.kernel.org/stable/c/a85402bff218f2b8f0d806e46c16c2f3d49cdda7"},{"url":"https://git.kernel.org/stable/c/c1a5bf1b6e1d5944183dcef3844a18c17219af4d"},{"url":"https://git.kernel.org/stable/c/dfff90a6eb2258e3b867994ae17af4a7ba3504d2"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00206,"epssPercentile":0.11056,"ingestedAt":"2026-09-14T11:11:19.886Z","slug":"CVE-2026-89592","body":"## Overview\n\nA flaw was found in the `accel/rocket` component of the Linux kernel. This vulnerability arises from two issues: a missing null check after a memory allocation failure and an integer overflow when calculating memory requirements based on user-supplied values. An attacker could exploit these flaws to cause a kernel null pointer dereference or out-of-bounds memory access, potentially leading to a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89592.json)\n\n**kernel: accel/rocket: fix NULL dereference and integer overflow in rocket_job_push()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nNot affected:\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- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208142,"id":"CVE-2026-89592","ts":1789922723753,"field":"cvss","old":"6.1","new":"5.5"},{"seq":204099,"id":"CVE-2026-89592","ts":1789490231431,"field":"cvss","old":null,"new":"6.1"},{"seq":204098,"id":"CVE-2026-89592","ts":1789490231431,"field":"severity","old":"none","new":"medium"},{"seq":147646,"id":"CVE-2026-89592","ts":1789270211724,"field":"cvss","old":null,"new":"6.1"},{"seq":147645,"id":"CVE-2026-89592","ts":1789270211724,"field":"severity","old":"none","new":"medium"},{"seq":109400,"id":"CVE-2026-89592","ts":1789183731768,"field":"cvss","old":null,"new":"6.1"},{"seq":109399,"id":"CVE-2026-89592","ts":1789183731768,"field":"severity","old":"none","new":"medium"}]}