CVE-2026-107778

MEDIUM 6.5

MIT krb5 through 1.22.2 NULL Pointer Dereference via krb5_rd_cred()

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-476
Vendor	mit
Product	krb5
Published	Oct 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

MIT / krb5

0 ≤ 1.22.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/krb5/krb5/pull/1511 github.com: https://github.com/krb5/krb5/commit/48afa9abb89ab2176bb20624d87d010b9984fc08 github.com: https://github.com/krb5/krb5/commit/62196e2b269159a5465f5b8d0ed7cf6f29c3282a github.com: https://github.com/krb5/krb5/blob/krb5-1.22.2-final/src/lib/krb5/krb/rd_cred.c#L77-L112 github.com: https://github.com/krb5/krb5 vulncheck.com: https://www.vulncheck.com/advisories/mit-krb5-through-1.22.2-null-pointer-dereference-via-krb5-rd-cred

Credits

Tristan Madani