{"action":"Upgrade krb5 to 1.21.3-5+deb13u1 or later.","affected":[{"fixed":"1.21.3-5+deb13u1","introduced":"0"}],"component":"krb5","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1.21.3-5+deb13u1"],"id":"tcs_01M5NRXT13V1TPHVC4G14BAN4B","modified_at":"2026-10-15T09:47:39.357096058Z","published_at":"2026-04-28T06:16:03.663Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-40355","https://security-tracker.debian.org/tracker/CVE-2026-40355"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-40355#Debian:13/krb5","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-40355"}],"summary":"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 una"}