{"id":"UBUNTU-CVE-2026-42250","details":"bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67","modified":"2026-09-01T09:45:05.084015434Z","published":"2026-05-28T14:16:00Z","related":["USN-8685-1"],"upstream":["CVE-2026-42250"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42250"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42250"},{"type":"REPORT","url":"https://cert.pl/en/posts/2026/05/CVE-2026-42250/"},{"type":"REPORT","url":"https://inbox.sourceware.org/bzip2-devel/20260528145407.293768-1-mark@klomp.org/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8685-1"}],"affected":[{"package":{"name":"bzip2","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.6-5ubuntu0.1~esm3"}]}],"versions":["1.0.6-4","1.0.6-5","1.0.6-5ubuntu0.1~esm1","1.0.6-5ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"bzip2","binary_version":"1.0.6-5ubuntu0.1~esm3"},{"binary_name":"lib32bz2-1.0","binary_version":"1.0.6-5ubuntu0.1~esm3"},{"binary_version":"1.0.6-5ubuntu0.1~esm3","binary_name":"lib64bz2-1.0"},{"binary_version":"1.0.6-5ubuntu0.1~esm3","binary_name":"libbz2-1.0"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","priority_reason":"Only a denial of service in a command line utility"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.6-8ubuntu0.2+esm1"}]}],"versions":["1.0.6-8","1.0.6-8ubuntu0.1","1.0.6-8ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"bzip2","binary_version":"1.0.6-8ubuntu0.2+esm1"},{"binary_version":"1.0.6-8ubuntu0.2+esm1","binary_name":"libbz2-1.0"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","priority_reason":"Only a denial of service in a command line utility"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.6-8.1ubuntu0.2+esm1"}]}],"versions":["1.0.6-8.1","1.0.6-8.1ubuntu0.1","1.0.6-8.1ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"bzip2","binary_version":"1.0.6-8.1ubuntu0.2+esm1"},{"binary_version":"1.0.6-8.1ubuntu0.2+esm1","binary_name":"libbz2-1.0"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","priority_reason":"Only a denial of service in a command line utility"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.8-2ubuntu0.1~esm1"}]}],"versions":["1.0.6-9.2","1.0.8-2"],"ecosystem_specific":{"priority_reason":"Only a denial of service in a command line utility","binaries":[{"binary_version":"1.0.8-2ubuntu0.1~esm1","binary_name":"bzip2"},{"binary_version":"1.0.8-2ubuntu0.1~esm1","binary_name":"libbz2-1.0"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.8-5ubuntu0.1"}]}],"versions":["1.0.8-4ubuntu3","1.0.8-4ubuntu4","1.0.8-5","1.0.8-5build1"],"ecosystem_specific":{"priority_reason":"Only a denial of service in a command line utility","binaries":[{"binary_version":"1.0.8-5ubuntu0.1","binary_name":"bzip2"},{"binary_version":"1.0.8-5ubuntu0.1","binary_name":"libbz2-1.0"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.8-5.1ubuntu0.1"}]}],"versions":["1.0.8-5build1","1.0.8-5ubuntu1","1.0.8-5.1","1.0.8-5.1build0.1"],"ecosystem_specific":{"availability":"No subscription required","priority_reason":"Only a denial of service in a command line utility","binaries":[{"binary_name":"bzip2","binary_version":"1.0.8-5.1ubuntu0.1"},{"binary_version":"1.0.8-5.1ubuntu0.1","binary_name":"libbz2-1.0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.8-6","1.0.8-6build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.8-6build1","binary_name":"bzip2"},{"binary_version":"1.0.8-6build1","binary_name":"libbz2-1.0"}],"priority_reason":"Only a denial of service in a command line utility"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}},{"package":{"name":"bzip2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bzip2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.8-6ubuntu0.1"}]}],"versions":["1.0.8-6build1","1.0.8-6build2"],"ecosystem_specific":{"binaries":[{"binary_name":"bzip2","binary_version":"1.0.8-6ubuntu0.1"},{"binary_version":"1.0.8-6ubuntu0.1","binary_name":"libbz2-1.0"}],"availability":"No subscription required","priority_reason":"Only a denial of service in a command line utility"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"low"}]}