Dashboard / CVE-2026-40355

CVE-2026-40355

HIGH
MEDIUM Priority: 0.05 BB Relevance: 75/100
Published: 2026-04-28 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
mit kerberos_5 1.18.0 – 1.22.2

References & Advisories (6)

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.65%
Raw Score 0.006450
Percentile 50.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00645
2026-10-28
0.00645

Intelligence Sources

nvd ref →

External Links