CVE-2025-24528: mit kerberos_5 Integer Overflow or Wraparound

Vulnerability summary

CVE-2025-24528 is a high (CVSS 7.1) Integer Overflow or Wraparound vulnerability in mit kerberos_5. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 41.9% of scored vulnerabilities.

Timeline

1. 16-01-2026
   PublishedVulnerability first disclosed.
2. 16-01-2026
   Last modifiedVulnerability information updated.

Description

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.