CVE-2026-107778CWE-476

CVE-2026-107778

Medium · published October 9, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
35.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00424 · 35.6th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-10-09T01:17Z
References (6)
https://github.com/krb5/krb5 · [email protected]https://github.com/krb5/krb5/blob/krb5-1.22.2-final/src/lib/krb5/krb/rd_cred.c#L77-L112 · [email protected]https://github.com/krb5/krb5/commit/48afa9abb89ab2176bb20624d87d010b9984fc08 · [email protected]https://github.com/krb5/krb5/commit/62196e2b269159a5465f5b8d0ed7cf6f29c3282a · [email protected]https://github.com/krb5/krb5/pull/1511 · [email protected]https://www.vulncheck.com/advisories/mit-krb5-through-1.22.2-null-pointer-dereference-via-krb5-rd-cred · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 20:15Z
    MIT krb5 through 1.22.2 NULL Pointer Dereference via krb5_rd_cred()
    cvelistv5
  • 08 OCT 20:15Z
    MIT krb5 through 1.22.2 NULL Pointer Dereference via krb5_rd_cred()
    cvelistv5