PT-2026-36352 · Hashcat · Hashcat

Feng Ning · Published 2026-05-01 · Updated 2026-05-13 · CVE-2026-42483

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions hashcat version 7.1.2

Description A heap-based buffer overflow exists in the Kerberos hash parser. The issue occurs within the module hash decode() function across several Kerberos-related modules. It is caused by the account info len variable being calculated from untrusted delimiter positions without upper-bound validation before the data is copied into a fixed-size account info buffer using memcpy(). This can lead to a denial of service or the execution of arbitrary code when processing a specially crafted Kerberos hash file.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

CVE-2026-42483

Affected Products

Hashcat

References · 11

• 🔥 https://gist.github.com/sgInnora/107f2eb20367e47d58c911e38d56a91f · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-42483 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-42483 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42483 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42483 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42483 · Security Note
• https://ubuntu.com/security/CVE-2026-42483 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2050228239235178872 · Twitter Post
• https://twitter.com/lyrie_ai/status/2054470964390273520 · Twitter Post
• https://twitter.com/lyrie_ai/status/2054470966269345968 · Twitter Post
• https://twitter.com/lyrie_ai/status/2054470963501105153 · Twitter Post