{"id":"CVE-2026-107778","title":"MIT Kerberos 5 (krb5) through 1.22.2 contains a NULL pointer dereference in make_cred_list() in rd_cred.c that allows authenticated Kerberos clients to crash services by sending mismatched KRB-CRED arrays","summary":"MIT Kerberos 5 (krb5) through 1.22.2 contains a NULL pointer dereference in make_cred_list() in rd_cred.c that allows authenticated Kerberos clients to crash services by sending mismatched KRB-CRED arrays. Attackers can send forwarded cr…","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","cwe":["CWE-476"],"published":"2026-10-08","updated":"2026-10-09","sourceUpdated":"2026-10-09T12:17:09.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107778","references":[{"url":"https://github.com/krb5/krb5","label":"disclosure@vulncheck.com"},{"url":"https://github.com/krb5/krb5/blob/krb5-1.22.2-final/src/lib/krb5/krb/rd_cred.c#L77-L112","label":"disclosure@vulncheck.com"},{"url":"https://github.com/krb5/krb5/commit/48afa9abb89ab2176bb20624d87d010b9984fc08","label":"disclosure@vulncheck.com"},{"url":"https://github.com/krb5/krb5/commit/62196e2b269159a5465f5b8d0ed7cf6f29c3282a","label":"disclosure@vulncheck.com"},{"url":"https://github.com/krb5/krb5/pull/1511","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/mit-krb5-through-1.22.2-null-pointer-dereference-via-krb5-rd-cred","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-08T22:11:53.858Z","slug":"CVE-2026-107778","body":"## Overview\n\nMIT Kerberos 5 (krb5) through 1.22.2 contains a NULL pointer dereference in make_cred_list() in rd_cred.c that allows authenticated Kerberos clients to crash services by sending mismatched KRB-CRED arrays. Attackers can send forwarded credentials with more tickets than ticket_info entries through gss_accept_sec_context() to crash GSS-API acceptor services, causing denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}