CVE-2026-40356
MEDIUM
NVD
CVSS Score
5.9
Severity
MEDIUM
Published
Apr 28, 2026
Vendor
unknown
Description
In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.