{"id":"UBUNTU-CVE-2026-42483","details":"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.","modified":"2026-05-20T16:25:43.836572265Z","published":"2026-05-01T14:16:00Z","upstream":["CVE-2026-42483"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42483"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42483"},{"type":"REPORT","url":"https://gist.github.com/sgInnora/107f2eb20367e47d58c911e38d56a91f"}],"affected":[{"package":{"name":"hashcat","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.60-1","4.0.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.0.1-1","binary_name":"hashcat"},{"binary_name":"hashcat-data","binary_version":"4.0.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}},{"package":{"name":"hashcat","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.1.0+ds1-1","5.1.0+ds1-2"],"ecosystem_specific":{"binaries":[{"binary_version":"5.1.0+ds1-2","binary_name":"hashcat"},{"binary_name":"hashcat-data","binary_version":"5.1.0+ds1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}},{"package":{"name":"hashcat","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.1.1+ds1-1","6.2.5+ds1-2"],"ecosystem_specific":{"binaries":[{"binary_version":"6.2.5+ds1-2","binary_name":"hashcat"},{"binary_name":"hashcat-data","binary_version":"6.2.5+ds1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}},{"package":{"name":"hashcat","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.2.6+ds1-1","6.2.6+ds1-1build1","6.2.6+ds1-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"hashcat","binary_version":"6.2.6+ds1-1build2"},{"binary_name":"hashcat-data","binary_version":"6.2.6+ds1-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}},{"package":{"name":"hashcat","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.2.6+ds2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"hashcat","binary_version":"6.2.6+ds2-1"},{"binary_name":"hashcat-data","binary_version":"6.2.6+ds2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}},{"package":{"name":"hashcat","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/hashcat?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.2.6+ds2-1","7.1.2+ds1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"hashcat","binary_version":"7.1.2+ds1-3"},{"binary_name":"hashcat-data","binary_version":"7.1.2+ds1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}