CVE-2026-40355

Medium

Open

TLP:CLEAR

NVD CVE.org

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Description

In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference 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, causing the process to terminate in parse_nego_message.

Details

CVSS Score: 5.9
EPSS Score ⓘ: 0.61%

46.1th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: Apr 28, 2026

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