CVE-2026-42483

Heap-based Buffer Overflow in Hashcat Kerberos Hash Parser

Published May 1, 2026 CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Heap-based Buffer Overflow in Hashcat Kerberos Hash Parser
Type Values Removed Values Added
Weaknesses CWE-122
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Type Values Removed Values Added
First Time appeared Hashcat
Hashcat hashcat
Weaknesses CWE-787
CPEs cpe:2.3:a:hashcat:hashcat:7.1.2:*:*:*:*:*:*:*
Vendors & Products Hashcat
Hashcat hashcat
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 1, 2026, 5:36 PM
Reserved
Apr 27, 2026, 12:00 AM
Status
Modified
Published
May 1, 2026, 2:16 PM
Modified
Nov 11, 2026, 9:10 PM