{"schemaVersion":3,"id":"USN-8939-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libxtst vulnerabilities\n\nIt was discovered that libXtst did not properly handle certain RECORD\nreplies from the X server. A malicious X server could possibly use this\nissue to cause libXtst clients to crash, resulting in a denial of service.\n(CVE-2026-94286)\n\nTobias Stoeckmann discovered that libXtst did not properly handle certain\nmemory operations. A malicious X server could possibly use this issue to\ncause libXtst to access memory out of bounds, resulting in a denial of\nservice. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-7951)\n\nTobias Stoeckmann discovered that libXtst did not properly handle certain\nreplies from the X server. A malicious X server could possibly use this\nissue to cause libXtst to enter an infinite loop, resulting in a denial of\nservice. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-7952)","dates":{"published":"2026-10-19T17:17:18.000Z","modified":"2026-10-19T23:43:25.831Z","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":"libxtst","name":"libxtst","label":"libxtst","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libxtst","purlType":"deb","versions":[{"text":"< 2:1.2.2-1ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.3-1ubuntu0.18.04.1~esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.3-1ubuntu0.20.04.1~esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.3-1ubuntu0.22.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.3-1.1ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.5-1ubuntu1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:1.2.5-1ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2:1.2.2-1ubuntu0.1~esm1 | < 2:1.2.3-1ubuntu0.18.04.1~esm1 | < 2:1.2.3-1ubuntu0.20.04.1~esm1 | < 2:1.2.3-1ubuntu0.22.04.1 | < 2:1.2.3-1.1ubuntu0.1 | < 2:1.2.5-1ubuntu1 | < 2:1.2.5-1ubuntu0.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8939-1","label":"ubuntu.com/security/notices/USN-8939-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-7951","label":"ubuntu.com/security/CVE-2016-7951","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-7952","label":"ubuntu.com/security/CVE-2016-7952","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-94286","label":"ubuntu.com/security/CVE-2026-94286","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2016-7951","CVE-2016-7952","CVE-2026-94286"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-19T17:17:18.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-19T23:43:25.831Z","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":"2026-10-20T15:30:36.564Z","stale":false,"partial":false}}