Vulnerability · Published Mar 31, 2025 · Assigned by GitHub_M
CVE-2025-29908Netty QUIC hash collision DoS attack
Medium 5.3
In plain English
A medium-severity security flaw in netty-incubator-codec-quic from netty. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Netty QUIC codec is a QUIC codec for netty which makes use of quiche. 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). This vulnerability is fixed in 0.0.71.Final.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | io.netty.incubator:netty-incubator-codec-quic | 0.0.71.Final | GHSA-hqqc-jr88-p6x2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| netty | netty-incubator-codec-quic | < 0.0.71.Final |
Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L