CVE-2026-60109 | Zeek before 8.0.9 contains a null pointer dereference vulner… | CVSS 7.5 HIGH

Description

Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to crash the sensor by sending a crafted KRB_ERROR message with error-code 25 (KDC_ERR_PREAUTH_REQUIRED) containing a PA-DATA element with padata-type 2, 3, 11, or 19. Attackers can exploit a parser and analyzer state mismatch where proc_padata() dereferences an uninitialized pa_data_element field selected by the wrong parsing arm, triggering a crash via a single UDP or TCP packet to port 88 without any credentials or prior authentication.

Metadata

CVE ID: CVE-2026-60109
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-08 13:27 UTC
Published: 2026-07-09 14:19 UTC
Last updated: 2026-07-09 18:17 UTC
Primary CWE: CWE-476
NULL Pointer Dereference
Vendor / Product: zeek / zeek
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
zeek	zeek	—	0 < 8.0.9

Weakness (CWE)

CWE	Source	Description
CWE-476	cna	NULL Pointer Dereference

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (3)