{"id":"USN-8691-1","summary":"attr vulnerability","details":"It was discovered that attr incorrectly handled symbolic links while\ntraversing directory paths. A local attacker who controlled a pathname\ncomponent could possibly use this issue to redirect privileged attr\noperations to arbitrary files and gain elevated privileges.","modified":"2026-08-31T22:26:26.842826826Z","published":"2026-08-31T10:06:35Z","related":["UBUNTU-CVE-2026-54371"],"upstream":["CVE-2026-54371","UBUNTU-CVE-2026-54371"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8691-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-54371"}],"affected":[{"package":{"name":"attr","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.4.47-1ubuntu1+esm1"}]}],"versions":["1:2.4.47-1","1:2.4.47-1ubuntu1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"attr","binary_version":"1:2.4.47-1ubuntu1+esm1"},{"binary_version":"1:2.4.47-1ubuntu1+esm1","binary_name":"libattr1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"id":"CVE-2026-54371","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json"}},{"package":{"name":"attr","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.4.47-2ubuntu0.16.04.1~esm1"}]}],"versions":["1:2.4.47-2"],"ecosystem_specific":{"binaries":[{"binary_name":"attr","binary_version":"1:2.4.47-2ubuntu0.16.04.1~esm1"},{"binary_name":"libattr1","binary_version":"1:2.4.47-2ubuntu0.16.04.1~esm1"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-54371","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"attr","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.4.47-2ubuntu0.18.04.1~esm1"}]}],"versions":["1:2.4.47-2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.4.47-2ubuntu0.18.04.1~esm1","binary_name":"attr"},{"binary_version":"1:2.4.47-2ubuntu0.18.04.1~esm1","binary_name":"libattr1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-54371","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json"}},{"package":{"name":"attr","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.4.48-5ubuntu0.1~esm1"}]}],"versions":["1:2.4.48-4","1:2.4.48-5"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"attr","binary_version":"1:2.4.48-5ubuntu0.1~esm1"},{"binary_name":"libattr1","binary_version":"1:2.4.48-5ubuntu0.1~esm1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-54371"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json"}},{"package":{"name":"attr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.5.1-1ubuntu0.1"}]}],"versions":["1:2.4.48-6build2","1:2.5.1-1","1:2.5.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"attr","binary_version":"1:2.5.1-1ubuntu0.1"},{"binary_name":"libattr1","binary_version":"1:2.5.1-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-54371"}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"attr","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.5.2-1ubuntu0.1"}]}],"versions":["1:2.5.1-4","1:2.5.1-5","1:2.5.2-1","1:2.5.2-1build1","1:2.5.2-1build1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.5.2-1ubuntu0.1","binary_name":"attr"},{"binary_version":"1:2.5.2-1ubuntu0.1","binary_name":"libattr1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-54371"}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8691-1.json"}},{"package":{"name":"attr","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/attr?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.5.2-4ubuntu0.1"}]}],"versions":["1:2.5.2-3build1","1:2.5.2-3build2","1:2.5.2-4"],"ecosystem_specific":{"binaries":[{"binary_name":"attr","binary_version":"1:2.5.2-4ubuntu0.1"},{"binary_name":"libattr1","binary_version":"1:2.5.2-4ubuntu0.1"}],"availability":"No subscription 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