A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.

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History

Sat, 02 May 2026 08:30:00 +0000

Type Values Removed Values Added
Title Stack-based Buffer Overflow in hashcat’s Hex Mangle Functions Allowing Potential Code Execution

Fri, 01 May 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-121
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': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 01 May 2026 18:00:00 +0000

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'}


Fri, 01 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-01T18:36:42.292Z

Reserved: 2026-04-27T00:00:00.000Z

Link: CVE-2026-42482

cve-icon Vulnrichment

Updated: 2026-05-01T18:32:13.774Z

cve-icon NVD

Status : Modified

Published: 2026-05-01T14:16:22.577

Modified: 2026-05-01T19:16:32.830

Link: CVE-2026-42482

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-02T08:15:16Z

Weaknesses