{"id":"CVE-2026-40355","revision":null,"records":[{"revision":"c4184c5d43e64bddbc3861c8387ea4a0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-40355","aliases":[],"title":"In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger…","description":"In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message.","state":0,"publishedAt":"2026-04-28T00:00:00+00:00","modifiedAt":"2026-10-15T01:18:27.249+00:00","affected":[{"ecosystem":"Vendor product","name":"Kerberos 5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Kerberos 5\",\n                    \"vendor\": \"MIT\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"1.22.3\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.18\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://web.mit.edu/kerberos/advisories/","https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html","https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-40355","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-40355","identifiers":["CVE-2026-40355"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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