Critical
hashcat — security advisory
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.
- Products
- hashcat
- Affected versions
- 3.60-1, 4.0.1-1, 5.1.0+ds1-1, 5.1.0+ds1-2, 6.1.1+ds1-1, 6.2.5+ds1-2, 6.2.6+ds1-1, 6.2.6+ds1-1build1, 6.2.6+ds1-1build2, 6.2.6+ds2-1, 7.1.2+ds1-3, 7.1.2+ds1-4
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42482
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:03 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-42482
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
hashcat
Fixed versions: Not specified
Complete source record
{
"id": "ff903af4b838e77dd5299f788f1fe06ae43e5c9c19255daf4acd43723de86fea",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-42482",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-42482",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-42482",
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"ecosystem_specific": {
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],
"modified": "2026-10-17T13:00:05.175904177Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-42482",
"https://www.cve.org/CVERecord?id=CVE-2026-42482",
"https://gist.github.com/sgInnora/107f2eb20367e47d58c911e38d56a91f"
]
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"source_id": "core-osv",
"document_id": 360290,
"published_at": "2026-05-01T14:16:00+00:00"
}