{"schemaVersion":3,"id":"USN-8292-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libarchive vulnerabilities\n\nIt was discovered that libarchive incorrectly handled certain RAR\narchives. An attacker could possibly use this issue to cause an\nout-of-bounds read via a crafted RAR archive, leading to sensitive\nmemory disclosure. (CVE-2026-4424)\n\nIt was discovered that libarchive incorrectly handled certain ISO files.\nAn attacker could possibly use this issue to cause incorrect memory\nallocation via a crafted ISO file, leading to a denial of service.\n(CVE-2026-4426)\n\nIt was discovered that libarchive incorrectly handled block pointer\nallocation in zisofs on 32-bit systems. An attacker could possibly use\nthis issue to cause a heap buffer overflow via a crafted ISO9660 image,\npossibly leading to arbitrary code execution. (CVE-2026-5121)","dates":{"published":"2026-05-21T14:28:35.000Z","modified":"2026-05-21T21:32:57.062Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"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":[],"affected":[{"vendor":"ubuntu","product":"libarchive","name":"libarchive","label":"libarchive","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libarchive","purlType":"deb","versions":[{"text":"< 3.1.2-7ubuntu2.8+esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 3.1.2-11ubuntu0.16.04.8+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 3.2.2-3.1ubuntu0.7+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 3.4.0-2ubuntu1.5+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 3.6.0-1ubuntu1.7","noFixRecorded":false,"fixedIn":null},{"text":"< 3.7.2-2ubuntu0.7","noFixRecorded":false,"fixedIn":null},{"text":"< 3.7.7-0ubuntu3.2","noFixRecorded":false,"fixedIn":null},{"text":"< 3.8.5-1ubuntu2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.1.2-7ubuntu2.8+esm5 | < 3.1.2-11ubuntu0.16.04.8+esm3 | < 3.2.2-3.1ubuntu0.7+esm3 | < 3.4.0-2ubuntu1.5+esm2 | < 3.6.0-1ubuntu1.7 | < 3.7.2-2ubuntu0.7 | < 3.7.7-0ubuntu3.2 | < 3.8.5-1ubuntu2.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8292-1","label":"ubuntu.com/security/notices/USN-8292-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-4424","label":"ubuntu.com/security/CVE-2026-4424","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-4426","label":"ubuntu.com/security/CVE-2026-4426","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-5121","label":"ubuntu.com/security/CVE-2026-5121","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-4424","CVE-2026-4426","CVE-2026-5121"],"downstream":[],"duplicates":[],"related":["CVE-2026-4424","CVE-2026-4426","CVE-2026-5121"]},"timeline":[{"kind":"published","date":"2026-05-21T14:28:35.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-21T21:32:57.062Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:42:47.451Z","stale":false,"partial":false}}