{"id":"CVE-2025-29785","aliases":["GHSA-j972-j939-p2v3","GO-2025-3735"],"url":"https://o3.security/vulnerability/CVE-2025-29785","summary":"quic-go Has Panic in Path Probe Loss Recovery Handling","details":"### Impact\n\nThe loss recovery logic for path probe packets that was added in the v0.50.0 release can be used to trigger a nil-pointer dereference by a malicious QUIC client.\n\nIn order to do so, the attacker first sends valid QUIC packets from different remote addresses (thereby triggering the newly added path validation logic: the server sends path probe packets), and then sending ACKs for packets received from the server specifically crafted to trigger the nil-pointer dereference.\n\n### Patches\n\nv0.50.1 contains a patch that fixes the vulnerability.\n\nThis release contains a test that generates random sequences of sent packets (both regular and path probe packets), that was used to verify that the patch actually covers all corner cases.\n\n### Workarounds\n\nNo.\n\n### References\n\nThis issue has been reported publicly, but without any context, in https://github.com/quic-go/quic-go/issues/4981.","published":"2025-06-02T10:44:18.817Z","modified":"2026-08-12T03:51:37.384430512Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/quic-go/quic-go","fixedVersion":"0.50.1"}],"fix":{"url":"https://github.com/quic-go/quic-go/commit/b90058aba5f65f48e0e150c89bbaa21a72dda4de","label":"quic-go/quic-go@b90058a"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/29xxx/CVE-2025-29785.json"},{"type":"ADVISORY","url":"https://github.com/quic-go/quic-go/security/advisories/GHSA-j972-j939-p2v3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-29785"},{"type":"REPORT","url":"https://github.com/quic-go/quic-go/issues/4981"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/b90058aba5f65f48e0e150c89bbaa21a72dda4de"},{"type":"PACKAGE","url":"https://github.com/quic-go/quic-go"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:37.384430512Z"}}