CVE-2025-11936

EUVD-2025-198524
Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
Affected Products (NVD)
VendorProductVersion
wolfsslwolfssl
5.8.2 ≤
𝑥
< 5.8.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
wolfssl
bookworm
no-dsa
bullseye
postponed
forky
5.8.4-1
fixed
sid
5.8.4-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
wolfssl
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
plucky
ignored
questing
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/wolfSSL/wolfssl
https://github.com/wolfSSL/wolfssl/pull/9117
https://github.com/wolfSSL/wolfssl/pull/9117