{"schemaVersion":3,"id":"CVE-2026-79655","aliases":["UBUNTU-CVE-2026-79655","DEBIAN-CVE-2026-79655"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-08-25T13:49:37.593Z","modified":"2026-10-06T07:33:16.935Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00214,"percentile":0.11087,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.072,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00142},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00214,"percentile":0.11087}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00142,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00186,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00214,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00214,"percentile":0.11087}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access ('Link Following')","description":"The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/59.html"}],"affected":[{"vendor":"debian","product":"sos","name":"sos","label":"sos","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/sos","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 4.12.0-2","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 4.12.0-2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"sos","name":"sos","label":"sos","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/sos","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"sosreport","name":"sosreport","label":"sosreport","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/sosreport","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-79655","label":"access.redhat.com/security/cve/CVE-2026-79655","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2523363","label":"bugzilla.redhat.com/show_bug.cgi?id=2523363","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT"]},{"url":"https://github.com/sosreport/sos/issues/4460","label":"github.com/sosreport/sos/issues/4460","hostname":"github.com","tags":[]},{"url":"https://github.com/sosreport/sos/pull/4461","label":"github.com/sosreport/sos/pull/4461","hostname":"github.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-79655","label":"ubuntu.com/security/CVE-2026-79655","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-79655","label":"www.cve.org/CVERecord?id=CVE-2026-79655","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-79655","label":"security-tracker.debian.org/tracker/CVE-2026-79655","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79655","label":"nvd.nist.gov/vuln/detail/CVE-2026-79655","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-25T13:49:37.593Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-06T07:33:16.935Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T23:40:59.579Z","stale":false,"partial":false}}