{"id":"UBUNTU-CVE-2026-79655","details":"A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets are not properly validated. This enables the attacker to write files to arbitrary locations on the system with the privileges of the sos clean process, which often runs as root.","modified":"2026-09-18T23:45:03.223714999Z","published":"2026-08-25T14:16:00Z","upstream":["CVE-2026-79655"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-79655"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-79655"},{"type":"REPORT","url":"https://github.com/sosreport/sos/pull/4461"}],"affected":[{"package":{"name":"sosreport","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0-1","3.1-1","3.1-1ubuntu1","3.1-1ubuntu2","3.1-1ubuntu2.1","3.1-1ubuntu2.2","3.4-1~ubuntu14.04.1","3.5-1~ubuntu14.04.2","3.5-1~ubuntu14.04.3","3.5-1~ubuntu14.04.3+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"3.5-1~ubuntu14.04.3+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"}},{"package":{"name":"sosreport","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2-2ubuntu1","3.2+git276-g7da50d6-1","3.2+git276-g7da50d6-2","3.2+git276-g7da50d6-3","3.2+git276-g7da50d6-3build1","3.2+git276-g7da50d6-3ubuntu1","3.4-1~ubuntu16.04.1","3.5-1~ubuntu16.04.2","3.5-1~ubuntu16.04.3","3.6-1ubuntu0.16.04.2","3.6-1ubuntu0.16.04.3","3.6-1ubuntu0.16.04.4","3.9-1ubuntu0.16.04.1","3.9-1ubuntu0.16.04.2","3.9.1-1ubuntu0.16.04.1","3.9.1-1ubuntu0.16.04.2","3.9.1-1ubuntu0.16.04.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"3.9.1-1ubuntu0.16.04.2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"}},{"package":{"name":"sosreport","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4-1","3.5-1","3.5-1ubuntu1","3.5-1ubuntu2","3.5-1ubuntu3","3.5-1ubuntu3.18.04.1","3.6-1ubuntu0.18.04.2","3.6-1ubuntu0.18.04.3","3.6-1ubuntu0.18.04.4","3.9-1ubuntu0.18.04.1","3.9-1ubuntu0.18.04.2","3.9-1ubuntu0.18.04.3","3.9.1-1ubuntu0.18.04.1","3.9.1-1ubuntu0.18.04.2","3.9.1-1ubuntu0.18.04.3","4.1-1ubuntu0.18.04.1","4.1-1ubuntu0.18.04.2","4.1-1ubuntu0.18.04.3","4.3-1ubuntu0.18.04.1","4.3-1ubuntu0.18.04.2","4.4-1ubuntu0.18.04.1","4.4-1ubuntu0.18.04.3","4.8.2-0ubuntu0~18.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"4.8.2-0ubuntu0~18.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"}},{"package":{"name":"sosreport","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6-1ubuntu3","3.8-1ubuntu1","3.8-1ubuntu2","3.8-1ubuntu3","3.9-1ubuntu1","3.9-1ubuntu2","3.9-1ubuntu2.1","3.9.1-1ubuntu0.20.04.1","3.9.1-1ubuntu0.20.04.2","4.0-1~ubuntu0.20.04.1","4.0-1~ubuntu0.20.04.2","4.0-1~ubuntu0.20.04.3","4.1-1ubuntu0.20.04.1","4.1-1ubuntu0.20.04.2","4.1-1ubuntu0.20.04.3","4.2-1ubuntu0.20.04.1","4.3-1ubuntu0.20.04.1","4.3-1ubuntu0.20.04.2","4.4-1ubuntu0.20.04.1","4.5.6-0ubuntu1~20.04.1","4.5.6-0ubuntu1~20.04.2","4.7.2-0ubuntu1~20.04.1","4.7.2-0ubuntu1~20.04.2","4.8.2-0ubuntu0~20.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"4.8.2-0ubuntu0~20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"}},{"package":{"name":"sosreport","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1-1ubuntu2","4.1-1ubuntu3","4.2-1ubuntu2","4.3-1ubuntu1","4.3-1ubuntu2","4.3-1ubuntu2.1","4.4-1ubuntu1.22.04.1","4.5.6-0ubuntu1~22.04.1","4.5.6-0ubuntu1~22.04.2","4.7.2-0ubuntu1~22.04.1","4.7.2-0ubuntu1~22.04.2","4.8.2-0ubuntu0~22.04.1","4.8.2-0ubuntu0~22.04.2","4.9.2-0ubuntu0~22.04.1","4.10.2-0ubuntu0~22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"4.10.2-0ubuntu0~22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"}},{"package":{"name":"sosreport","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/sosreport?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.6-0ubuntu2","4.5.6-0ubuntu4","4.7.2-0ubuntu1~24.04.1","4.7.2-0ubuntu1~24.04.2","4.8.2-0ubuntu0~24.04.1","4.8.2-0ubuntu0~24.04.2","4.9.2-0ubuntu0~24.04.1","4.10.2-0ubuntu0~24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"sosreport","binary_version":"4.10.2-0ubun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