What is RHSA-2026:16799?

RHSA-2026:16799 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: krb5 security update

Which CVE IDs does RHSA-2026:16799 cover?

RHSA-2026:16799 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-2026:16799?

RHSA-2026:16799 has a CVSS v3 base score of 5.9, published by Red Hat Product Security.

RHSA-2026:16799HighCVSS 5.9

Red Hat Security Advisory: krb5 security update

Vendor

Red Hat Product Security

Published

May 13, 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 (5)

selfhttps://access.redhat.com/errata/RHSA-2026:16799
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463368
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463370
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_16799.json