CVE-2026-45673

EUVD-2026-36445
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.8 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 17.18%
Affected Products (NVD)
VendorProductVersion
nettynetty
𝑥
< 4.1.135
nettynetty
4.2.0 ≤
𝑥
< 4.2.15
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
netty
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
netty
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
netty-tcnative
suse enterprise desktop 15 SP7
2.0.79-150200.3.45.1
fixed
suse enterprise sap 15 SP4
2.0.79-150200.3.45.1
fixed
suse enterprise sap 15 SP5
2.0.79-150200.3.45.1
fixed
suse enterprise sap 15 SP6
2.0.79-150200.3.45.1
fixed
suse enterprise sap 15 SP7
2.0.79-150200.3.45.1
fixed
suse enterprise server 15 SP4
2.0.79-150200.3.45.1
fixed
suse enterprise server 15 SP5
2.0.79-150200.3.45.1
fixed
suse enterprise server 15 SP6
2.0.79-150200.3.45.1
fixed
suse enterprise server 15 SP7
2.0.79-150200.3.45.1
fixed
Common Weakness Enumeration
References
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
https://github.com/netty/netty/security/advisories/GHSA-xmv7-r254-6q78