{"id":"UBUNTU-CVE-2026-61544","details":"libp2p-rust is the official Rust language implementation of the libp2p networking stack. Prior to 0.13.1, libp2p-quic could panic during an inbound QUIC handshake when a remote peer presented a valid short-lived libp2p TLS certificate and delayed the final TLS 1.3 handshake fragment until after the certificate expired. In the Quinn post-handshake upgrade path, transports/quic/src/connection/connecting.rs called libp2p_tls::certificate::parse a second time in remote_peer_id and used expect on the result. The repeated wall-clock validity check could reject the now-expired certificate, causing the expect call to terminate any application exposing an affected libp2p-quic listener. This vulnerability is fixed in 0.13.1.","modified":"2026-09-17T13:30:08.148122637Z","published":"2026-09-17T00:00:00Z","upstream":["CVE-2026-61544"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-61544"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-61544"},{"type":"REPORT","url":"https://github.com/libp2p/rust-libp2p/commit/212f3774af048e2cecfb2e6b1e08477685e52b22"},{"type":"REPORT","url":"https://github.com/libp2p/rust-libp2p/commit/e8f35e12c2418b04df6e9cdf036005e8aee3c7a2"},{"type":"REPORT","url":"https://github.com/libp2p/rust-libp2p/pull/6525"},{"type":"REPORT","url":"https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-5hq8-qhww-jm7q"}],"affected":[{"package":{"name":"rust-libp2p-identity","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-libp2p-identity?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.2.10+20250205+ds-1","0.2.12+20250805+ds-2","0.2.13+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-libp2p-identity-dev","binary_version":"0.2.13+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61544.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}