{"id":"CVE-2026-89539","title":"kernel: Linux kernel: SUNRPC memory leak due to duplicate CREDS_VALUE options (CVE-2026-89539)","summary":"A flaw was found in the SUNRPC subsystem of the Linux kernel. The `gssx_dec_option_array()` function, responsible for decoding options, does not correctly handle replies containing duplicate `CREDS_VALUE` entries. This oversight causes the…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-772","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T14:56:02+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89539"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532304"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89539"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89539"},{"url":"https://git.kernel.org/stable/c/2e4ce62385c1b8a887c5370af058ac7b52a8eaf9"},{"url":"https://git.kernel.org/stable/c/7a1d0501cbb962beba23377035d667bf3c1726ee"},{"url":"https://git.kernel.org/stable/c/9d94f046b23de0f77849ea69133063c949297e30"},{"url":"https://git.kernel.org/stable/c/f615b884310bf82d0014e3b5a92eb9aa88146685"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.09739,"ingestedAt":"2026-09-14T11:11:19.886Z","slug":"CVE-2026-89539","body":"## Overview\n\nA flaw was found in the SUNRPC subsystem of the Linux kernel. The `gssx_dec_option_array()` function, responsible for decoding options, does not correctly handle replies containing duplicate `CREDS_VALUE` entries. This oversight causes the system to allocate memory for credentials multiple times without releasing previous allocations, leading to a memory leak. A remote attacker could exploit this to consume system resources.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json)\n\n**kernel: Linux kernel: SUNRPC memory leak due to duplicate CREDS_VALUE options** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.\n\nAffected:\n\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205429,"id":"CVE-2026-89539","ts":1789576710438,"field":"cvss","old":null,"new":"5.9"},{"seq":205428,"id":"CVE-2026-89539","ts":1789576710438,"field":"severity","old":"none","new":"medium"}]}