Vulnerability Description
quic-go is an implementation of the QUIC protocol in Go. The 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. In 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. v0.50.1 contains a patch that fixes the vulnerability. This 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. No known workarounds are available.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/quic-go/quic-go/commit/b90058aba5f65f48e0e150c89bbaa21a72dda4
- https://github.com/quic-go/quic-go/issues/4981
- https://github.com/quic-go/quic-go/security/advisories/GHSA-j972-j939-p2v3
FAQ
What is CVE-2025-29785?
CVE-2025-29785 is a vulnerability with a CVSS score of 7.5 (HIGH). quic-go is an implementation of the QUIC protocol in Go. The 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 mali...
How severe is CVE-2025-29785?
CVE-2025-29785 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-29785?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.