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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | hashcat | No fix yet | — |
| Debian 13 | hashcat | No fix yet | — |
| Debian 12 | hashcat | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | hashcat | No fix yet | — |
| Ubuntu 26.04 LTS | hashcat | No fix yet | — |
| Ubuntu 25.10 | hashcat | No fix yet | — |
| Ubuntu 24.04 LTS | hashcat | No fix yet | — |
| Ubuntu 22.04 LTS | hashcat | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | hashcat | No fix yet | — |
| Ubuntu 18.04 LTS | hashcat | No fix yet | — |