{"id":"DEBIAN-CVE-2026-123571","details":"Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and causing denial of service.","modified":"2026-11-08T15:00:06.713318198Z","published":"2026-11-08T02:16:49.990Z","upstream":["CVE-2026-123571"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-123571"}],"affected":[{"package":{"name":"rust-hickory-dns","ecosystem":"Debian:13","purl":"pkg:deb/debian/rust-hickory-dns?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-1","0.25.2-1","0.25.2-2","0.25.2-3","0.26.1-1","0.26.1-2","0.26.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123571.json"}},{"package":{"name":"rust-hickory-dns","ecosystem":"Debian:14","purl":"pkg:deb/debian/rust-hickory-dns?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.26.3-1"}]}],"versions":["0.24.4-1","0.25.2-1","0.25.2-2","0.25.2-3","0.26.1-1","0.26.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123571.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"}]}