{"action":"Upgrade exim4 to 4.98.2-1+deb13u2 or later.","affected":[{"fixed":"4.98.2-1+deb13u2","introduced":"0"}],"component":"exim4","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.98.2-1+deb13u2"],"id":"tcs_01M5NRY2EX3TDEP2KBKJCE74VX","modified_at":"2026-10-01T03:03:04.751269168Z","published_at":"2026-04-30T22:16:25.477Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-40684","https://security-tracker.debian.org/tracker/CVE-2026-40684"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-40684#Debian:13/exim4","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-40684"}],"summary":"In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in"}