What is RHSA-2026:12220?

RHSA-2026:12220 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Which CVE IDs does RHSA-2026:12220 cover?

RHSA-2026:12220 covers the following CVE IDs: CVE-2026-40355, CVE-2026-40356. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:12220?

RHSA-2026:12220 has a CVSS v3 base score of 5.9, published by Red Hat Product Security.

RHSA-2026:12220HighCVSS 5.9

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Vendor

Red Hat Product Security

Published

April 30, 2026

Last Modified

June 2, 2026

🔗 CVE IDs covered (2)

CVE-2026-40355 →CVE-2026-40356 →

📋 Description

CVE-2026-40355 — krb5: MIT Kerberos 5: Denial of Service via NULL pointer dereference in NegoEx mechanism CVE-2026-40356 — krb5: MIT Kerberos 5 (krb5): Denial of Service via integer underflow and out-of-bounds read

🔗 References (6)

selfhttps://access.redhat.com/errata/RHSA-2026:12220
externalhttps://images.redhat.com/
externalhttps://access.redhat.com/security/cve/CVE-2026-40355
externalhttps://access.redhat.com/security/updates/classification/
externalhttps://access.redhat.com/security/cve/CVE-2026-40356
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_12220.json