Red Hat Security Advisory

RHSA-2026:24686

krb5 security update

Released 2026-06-09 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux AppStream E4S (v.9.4) krb5-devel-1.21.1-2.el9_4.5
Red Hat Enterprise Linux BaseOS E4S (v.9.4) krb5-1.21.1-2.el9_4.5, krb5-libs-1.21.1-2.el9_4.5, krb5-pkinit-1.21.1-2.el9_4.5 +4

Fixes 1 record

TI-2026-29131 CVE-2026-40356 · GHSA-f7p3-6rhj-p7jv

Integer underflow in moos-ivp Kerberos 5

LOW 34

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.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00604 Published 2026-04-28 Partial fix · 1.22.3 CWE-191