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CVE-2026-107778

7.1 high SSVC exploitation: none Awaiting Analysis

MIT Kerberos 5 (krb5) through 1.22.2 contains a NULL pointer dereference in make_cred_list() in rd_cred.c that allows authenticated Kerberos clients to crash services by sending mismatched KRB-CRED arrays. Attackers can send forwarded credentials with more tickets than ticket_info entries through gss_accept_sec_context() to crash GSS-API acceptor services, causing denial of service.

Fix

Microsoft's update · Moderate

  • Release Notes — azl3 krb5 1.21.3-5 on Azure Linux 3.0 · build 1.21.3-6

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-29.

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.1NVD modified 2026-10-09 12:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 6