{"schemaVersion":3,"id":"USN-8733-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"gzip vulnerabilities\n\nUSN-8733-1 fixed vulnerabilities in Gzip. This update provides the\ncorresponding fix for Gzip on Ubuntu 14.04 LTS, Ubuntu 18.04 LTS and Ubuntu\n20.04 LTS.\n\nOriginal advisory details:\n\n Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip's gzexe\nutility created temporary files in an insecure manner when mktemp was\nunavailable. A local attacker could possibly use this issue to overwrite\narbitrary files. (CVE-2026-41991)\n\n Elias Hasas, Michał Majchrowicz and Marcin Wyczechowski discovered that\nGzip incorrectly handled certain compressed files. An attacker could\npossibly use this issue to obtain sensitive information or cause Gzip to\ncrash, resulting in a denial of service. (CVE-2026-41992)","dates":{"published":"2026-09-22T16:04:21.000Z","modified":"2026-09-23T18:57:40.680Z","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":"gzip","name":"gzip","label":"gzip","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/gzip","purlType":"deb","versions":[{"text":"< 1.6-3ubuntu1+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6-5ubuntu1.2+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.10-0ubuntu4.1+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.6-3ubuntu1+esm2 | < 1.6-5ubuntu1.2+esm1 | < 1.10-0ubuntu4.1+esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8733-2","label":"ubuntu.com/security/notices/USN-8733-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-41991","label":"ubuntu.com/security/CVE-2026-41991","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-41992","label":"ubuntu.com/security/CVE-2026-41992","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-41991","CVE-2026-41992"],"downstream":[],"duplicates":[],"related":["CVE-2026-41991","CVE-2026-41992"]},"timeline":[{"kind":"published","date":"2026-09-22T16:04:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-23T18:57:40.680Z","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":"2026-10-19T18:46:21.860Z","stale":false,"partial":false}}