{"id":"CVE-2026-16461","title":"Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list formatting","summary":"A stack-based buffer overflow was found in rpcbind's rpcinfo utility. In rpcbdump() short mode (used by `rpcinfo -s`), version numbers from a remote RPCBPROC_DUMP reply are written into a fixed-size stack buffer without bounds checking. …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-121"],"vendor":"Red Hat","product":"rpcbind","affected":["rpcbind (all versions)","rpcbind (all versions)","rpcbind (all versions)","rpcbind (all versions)","rpcbind (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-22T14:29:48.233539Z"},"published":"2026-07-21","updated":"2026-11-05","sourceUpdated":"2026-11-05T16:47:44.099Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16461","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-16461"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502719","label":"RHBZ#2502719"}],"tags":["cve.org"],"epss":0.00259,"epssPercentile":0.17627,"ingestedAt":"2026-11-05T22:38:31.402Z","slug":"CVE-2026-16461","body":"## Overview\n\nA stack-based buffer overflow was found in rpcbind's rpcinfo utility. In rpcbdump() short mode (used by `rpcinfo -s`), version numbers from a remote RPCBPROC_DUMP reply are written into a fixed-size stack buffer without bounds checking. A user or administrator who runs `rpcinfo -s` against a malicious or compromised rpcbind endpoint could experience a crash or denial of service of the rpcinfo client.\n\n## Affected\n\n- `rpcbind (all versions)`\n- `rpcbind (all versions)`\n- `rpcbind (all versions)`\n- `rpcbind (all versions)`\n- `rpcbind (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nTo mitigate this issue, avoid using the `rpcinfo -s` command against untrusted, attacker-controlled, or compromised rpcbind hosts. Restrict the use of the rpcinfo utility to trusted internal endpoints or secure test environments only.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}