CVE-2026-60109 – Zeek < 8.0.9 Null Pointer Dereference DoS via Kerberos KRB_ERROR Parsing

CVE ID :CVE-2026-60109

Published : July 9, 2026, 3:16 p.m. | 32 minutes ago

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.

Severity: 8.7 | HIGH

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