What is CVE-2025-29908?

CVE-2025-29908 is a medium-severity vulnerability in Netty Netty-Incubator-Codec-Quic, classified under Inefficient Algorithmic Complexity. CVSS score: 5.3/10. Published 2025-03-31.

How severe is CVE-2025-29908?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Netty Netty-Incubator-Codec-Quic

CVE-2025-29908

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.

EPSS: 0.005 (42.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Netty Netty-incubator-codec-quic — versions < 0.0.71.Final

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-29908?: CVE-2025-29908 is a medium-severity vulnerability in Netty Netty-Incubator-Codec-Quic, classified under Inefficient Algorithmic Complexity. CVSS score: 5.3/10. Published 2025-03-31.
How severe is CVE-2025-29908?: Medium severity. CVSS v3 base score is 5.3 out of 10.