{"id":"ALPINE-CVE-2026-40684","details":"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 octal printing.","modified":"2026-11-03T06:32:55.452306453Z","published":"2026-04-30T22:16:25.477Z","upstream":["CVE-2026-40684"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2026-40684"}],"affected":[{"package":{"name":"exim","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/exim?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.98.2-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40684.json"}},{"package":{"name":"exim","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/exim?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.98.2-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40684.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}