{"id":"CVE-2026-89747","title":"kernel: tracing: Fix use-after-free in trace_pipe read on sub-buffer order change (CVE-2026-89747)","summary":"A flaw was found in the Linux kernel's tracing component. A local attacker could exploit a use-after-free vulnerability, a type of memory corruption, by manipulating the `trace_pipe` functionality. This occurs when the system attempts to r…","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-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T06:49:15+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89747"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532358"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89747"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89747"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89747.mbox"},{"url":"https://git.kernel.org/stable/c/05ebe1e1d7d38c2612bacfefe043a33572ae34cb"},{"url":"https://git.kernel.org/stable/c/372f8534244d632ad5118e8a87a11291b01712d3"},{"url":"https://git.kernel.org/stable/c/7a49d19ff9baaf61217e5ec14199c18bc2d93ee4"},{"url":"https://git.kernel.org/stable/c/ddbe921ed16a0ad2d9e09574c3f3aabec7528325"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00159,"epssPercentile":0.05433,"scores":{"vendor":4.1,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.472Z","slug":"CVE-2026-89747","body":"## Overview\n\nA flaw was found in the Linux kernel's tracing component. A local attacker could exploit a use-after-free vulnerability, a type of memory corruption, by manipulating the `trace_pipe` functionality. This occurs when the system attempts to read from memory that has already been released, leading to unpredictable behavior. Successful exploitation could result in system instability or a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json)\n\n**kernel: tracing: Fix use-after-free in trace_pipe read on sub-buffer order change** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n\nNot affected:\n\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\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205487,"id":"CVE-2026-89747","ts":1789576721829,"field":"cvss","old":"4.1","new":"7"},{"seq":205486,"id":"CVE-2026-89747","ts":1789576721829,"field":"severity","old":"medium","new":"high"},{"seq":202968,"id":"CVE-2026-89747","ts":1789403733155,"field":"cvss","old":"7.8","new":"4.1"},{"seq":202967,"id":"CVE-2026-89747","ts":1789403733155,"field":"severity","old":"high","new":"medium"},{"seq":197682,"id":"CVE-2026-89747","ts":1789384318372,"field":"cvss","old":"4.1","new":"7.8"},{"seq":197681,"id":"CVE-2026-89747","ts":1789384318372,"field":"severity","old":"medium","new":"high"},{"seq":183653,"id":"CVE-2026-89747","ts":1789356676271,"field":"cvss","old":"7.8","new":"4.1"},{"seq":183652,"id":"CVE-2026-89747","ts":1789356676271,"field":"severity","old":"high","new":"medium"},{"seq":153634,"id":"CVE-2026-89747","ts":1789285351643,"field":"cvss","old":null,"new":"7.8"},{"seq":153633,"id":"CVE-2026-89747","ts":1789285351643,"field":"severity","old":"none","new":"high"},{"seq":147321,"id":"CVE-2026-89747","ts":1789270209593,"field":"cvss","old":null,"new":"4.1"},{"seq":147320,"id":"CVE-2026-89747","ts":1789270209593,"field":"severity","old":"none","new":"medium"},{"seq":109080,"id":"CVE-2026-89747","ts":1789183730228,"field":"cvss","old":null,"new":"4.1"},{"seq":109079,"id":"CVE-2026-89747","ts":1789183730228,"field":"severity","old":"none","new":"medium"}]}