{"id":"USN-8138-1","summary":"rust-tar vulnerability","details":"It was discovered that tar-rs incorrectly handled symlinks when unpacking a\ntar archive. If a user or automated system were tricked into processing a\nspecially crafted tar archive, a remote attacker could use this issue to\nmodify permissions of arbitrary directories outside the extraction root,\nand possibly escalate privileges.","modified":"2026-04-02T21:29:25.492048763Z","published":"2026-04-01T13:35:16Z","related":["UBUNTU-CVE-2026-33056"],"upstream":["CVE-2026-33056","UBUNTU-CVE-2026-33056"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8138-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33056"}],"affected":[{"package":{"name":"rust-tar","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/rust-tar@0.4.37-3ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.37-3ubuntu0.1"}]}],"versions":["0.4.26-1","0.4.37-1","0.4.37-3"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-tar+default-dev","binary_version":"0.4.37-3ubuntu0.1"},{"binary_name":"librust-tar-dev","binary_version":"0.4.37-3ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-33056","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8138-1.json"}},{"package":{"name":"rust-tar","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rust-tar@0.4.40-1ubuntu0.1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.40-1ubuntu0.1"}]}],"versions":["0.4.38-2","0.4.40-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-tar-dev","binary_version":"0.4.40-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-33056","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8138-1.json"}},{"package":{"name":"rust-tar","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/rust-tar@0.4.43-4ubuntu0.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.43-4ubuntu0.1"}]}],"versions":["0.4.43-4"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-tar-dev","binary_version":"0.4.43-4ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"id":"CVE-2026-33056","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8138-1.json"}}],"schema_version":"1.7.5"}