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.

MediumVendor CVSS 5.9 / 10 1 CVE Published May 1, 2026 at 1:03 AM UTC

Summary

Mariner

CBL-Mariner Releases Release Notes

May 1, 2026 at 1:03 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 25, 2026 at 2:36 AM UTC
Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
Sep 27, 2026 at 11:11 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Nov 10, 2026 at 2:00 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

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