CVE-2026-40356

HighCVSS 7.5/10Last modified Jul 8, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191

Affected software

No affected versions have been published.

Timeline

Published
Apr 28, 2026
Last modified
Jul 8, 2026
NVD status
Analyzed

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CVE-2026-40356: High severity, CVSS 7.5 | Vulnix