CVE-2026-42483: A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of…
CVE-2026-42483 · Severity: critical · CVSS 9.8 · Published 2026-05-01
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
No. Junglewise Threat Intelligence has no report of CVE-2026-42483 being exploited in the wild.
How severe is CVE-2026-42483?
Critical severity, with a CVSS score of 9.8, published 1 May 2026.
Which products and versions are affected?
Hashcat. The advisory does not name versions.
Is there a fix for CVE-2026-42483?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-42483?
Check whether you run Hashcat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.