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OpenAdvisories
High · 7.3 CVE-2026-42483 EUVD-2026-26530GHSA-h95h-gpf2-gm79

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 exec…

Published May 1, 2026 · Updated May 1, 2026 · Assigned by mitre

Description

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.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 hashcat No fix yet —
Debian 13 hashcat No fix yet —
Debian 12 hashcat No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 hashcat No fix yet —
Ubuntu 26.04 LTS hashcat No fix yet —
Ubuntu 25.10 hashcat No fix yet —
Ubuntu 24.04 LTS hashcat No fix yet —
Ubuntu 22.04 LTS hashcat No fix yet —
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS hashcat No fix yet —
Ubuntu 18.04 LTS hashcat No fix yet —

References