{"id":"DEBIAN-CVE-2026-31812","details":"Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14.","modified":"2026-10-01T03:03:03.885246313Z","published":"2026-03-10T22:16:18.840Z","upstream":["CVE-2026-31812"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-31812"}],"affected":[{"package":{"name":"rust-quinn-proto","ecosystem":"Debian:12","purl":"pkg:deb/debian/rust-quinn-proto?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.2-1","0.10.5-1","0.10.5-2","0.10.6-1","0.11.13-1","0.11.14-1","0.11.16-1","0.11.9-1","0.11.9-2","0.11.9-3","0.9.2-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31812.json"}},{"package":{"name":"rust-quinn-proto","ecosystem":"Debian:13","purl":"pkg:deb/debian/rust-quinn-proto?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.13-1","0.11.14-1","0.11.16-1","0.11.9-1","0.11.9-2","0.11.9-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31812.json"}},{"package":{"name":"rust-quinn-proto","ecosystem":"Debian:14","purl":"pkg:deb/debian/rust-quinn-proto?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.14-1"}]}],"versions":["0.11.13-1","0.11.9-1","0.11.9-2","0.11.9-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31812.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}