Uncaught Exception in quic-go - CVE-2025-29785
Published: April 25, 2026
Vulnerability identifier: #VU127913
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2025-29785
CWE-ID: CWE-248
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an uncaught exception in the loss recovery logic for path probe packets when handling specially crafted ACKs for server-sent packets during path validation. A remote attacker can send valid QUIC packets from different remote addresses and then send specially crafted ACKs to cause a denial of service.
Affected software
quic-go
How to mitigate CVE-2025-29785
Install security update from vendor's website.
quic-go - update to 0.50.1