{"id":"CVE-2026-89498","title":"kernel: orangefs: fix double-free of trailer_buf on readdir copy failure (CVE-2026-89498)","summary":"A flaw was found in OrangeFS within the Linux kernel. A local client, by sending a specially crafted readdir downcall with a declared trailer_size exceeding the actual supplied bytes, can trigger a double-free vulnerability. This memory co…","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-763","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T05:08:31+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89498.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89498.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89498"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532343"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89498"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89498"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89498.mbox"},{"url":"https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43"},{"url":"https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e"},{"url":"https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480"},{"url":"https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da"},{"url":"https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4"},{"url":"https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb"},{"url":"https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad"},{"url":"https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00176,"epssPercentile":0.07418,"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89498","body":"## Overview\n\nA flaw was found in OrangeFS within the Linux kernel. A local client, by sending a specially crafted readdir downcall with a declared trailer_size exceeding the actual supplied bytes, can trigger a double-free vulnerability. This memory corruption issue can lead to a system crash, resulting in a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89498.json)\n\n**kernel: orangefs: fix double-free of trailer_buf on readdir copy failure** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.\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":205499,"id":"CVE-2026-89498","ts":1789576722230,"field":"cvss","old":"4.1","new":"5.5"},{"seq":203992,"id":"CVE-2026-89498","ts":1789490230953,"field":"cvss","old":null,"new":"4.1"},{"seq":203991,"id":"CVE-2026-89498","ts":1789490230953,"field":"severity","old":"none","new":"medium"},{"seq":147327,"id":"CVE-2026-89498","ts":1789270210406,"field":"cvss","old":null,"new":"4.1"},{"seq":147326,"id":"CVE-2026-89498","ts":1789270210406,"field":"severity","old":"none","new":"medium"},{"seq":109084,"id":"CVE-2026-89498","ts":1789183730243,"field":"cvss","old":null,"new":"4.1"},{"seq":109083,"id":"CVE-2026-89498","ts":1789183730243,"field":"severity","old":"none","new":"medium"}]}