{"id":"CVE-2026-85231","title":"Libtirpc: libtirpc: denial of service via unbounded memory allocation during rpcsec_gss decoding","summary":"A flaw was found in libtirpc. An authenticated remote attacker could exploit this vulnerability by sending oversized wrapped data requests to an RPC (Remote Procedure Call) service configured with RPCSEC_GSS (Remote Procedure Call Securi…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-770"],"vendor":"Red Hat","product":"libtirpc","affected":["libtirpc (all versions)","libtirpc (all versions)","libtirpc (all versions)","libtirpc (all versions)","libtirpc (all versions)","libtirpc (all versions)","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T19:09:58.126991Z"},"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:10:28.515Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-85231","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-85231"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478512","label":"RHBZ#2478512"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.624Z","slug":"CVE-2026-85231","body":"## Overview\n\nA flaw was found in libtirpc. An authenticated remote attacker could exploit this vulnerability by sending oversized wrapped data requests to an RPC (Remote Procedure Call) service configured with RPCSEC_GSS (Remote Procedure Call Security-Generic Security Service) integrity or privacy. This can lead to unbounded memory allocation, resulting in a Denial of Service (DoS) by exhausting system resources and causing the service to become unstable or terminate.\n\n## Affected\n\n- `libtirpc (all versions)`\n- `libtirpc (all versions)`\n- `libtirpc (all versions)`\n- `libtirpc (all versions)`\n- `libtirpc (all versions)`\n- `libtirpc (all versions)`\n- `openshift/ose-rhel-coreos-8 (all versions)`\n- `openshift/ose-rhel-coreos-9 (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nTo reduce exposure, disable RPCSEC_GSS integrity or privacy modes on externally reachable RPC services where feasible. Implement strict request or transport record size limits in the embedding RPC service before wrapped blob decoding. Additionally, consider using process memory limits or supervision to contain single-process memory exhaustion.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}