Vulnerability · Published May 1, 2026 · Assigned by mitre
CVE-2026-42482
High 7.5
In plain English
A high-severity stack buffer overflow in the hashcat package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | hashcat | no fix listed | DEBIAN-CVE-2026-42482 |
| Debian:13 | hashcat | no fix listed | DEBIAN-CVE-2026-42482 |
| Debian:14 | hashcat | no fix listed | DEBIAN-CVE-2026-42482 |
| Ubuntu:22.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-42482 |
| Ubuntu:24.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-42482 |
| Ubuntu:25.10 | hashcat | no fix listed | UBUNTU-CVE-2026-42482 |
| Ubuntu:26.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-42482 |
| Ubuntu:26.10 | hashcat | no fix listed | UBUNTU-CVE-2026-42482 |
Affected products (as reported)
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H