Medium severity · published Mar 31, 2025
CVE-2025-29908
Netty QUIC hash collision DoS attack
5.3
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
netty-incubator-codec-quic · netty
< 0.0.71.Final · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-29908
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-29908
github.com
https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
github.com
https://github.com/netty/netty-incubator-codec-quic/commit/e059bd9b78723f8b035e0c547e42ce263f03461c
github.com
https://github.com/netty/netty-incubator-codec-quic/security/advisories/GHSA-hqqc-jr88-p6x2