medium5.3
CVE-2025-29908
Netty QUIC hash collision DoS attack
Impact
An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). See https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | io.netty.incubator:netty-incubator-codec-quic | < 0.0.71.Final | 0.0.71.Final |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
- https://github.com/netty/netty-incubator-codec-quic/commit/e059bd9b78723f8b035e0c547e42ce263f03461c
- https://github.com/netty/netty-incubator-codec-quic/security/advisories/GHSA-hqqc-jr88-p6x2
- https://github.com/advisories/GHSA-hqqc-jr88-p6x2
- https://nvd.nist.gov/vuln/detail/CVE-2025-29908