{"schemaVersion":3,"id":"USN-7935-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux-azure, linux-azure-6.8 vulnerabilities\n\nJean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered\nthat the Linux kernel contained insufficient branch predictor isolation\nbetween a guest and a userspace hypervisor for certain processors. This\nflaw is known as VMSCAPE. An attacker in a guest VM could possibly use this\nto expose sensitive information from the host OS. (CVE-2025-40300)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - Cryptographic API;\n  - HSI subsystem;\n  - Media drivers;\n  - Network drivers;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n  - Memory management;\n  - Appletalk network protocol;\n  - Netfilter;\n  - TLS protocol;\n(CVE-2025-21729, CVE-2025-37838, CVE-2025-37958, CVE-2025-38118,\nCVE-2025-38227, CVE-2025-38352, CVE-2025-38616, CVE-2025-38666,\nCVE-2025-38678, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)","dates":{"published":"2025-12-15T23:35:24.000Z","modified":"2026-10-20T10:46:04.409Z","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":"linux-azure","name":"linux-azure","label":"linux-azure","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure","purlType":"deb","versions":[{"text":"< 6.8.0-1044.50","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.8.0-1044.50","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure-6.8","name":"linux-azure-6.8","label":"linux-azure-6.8","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure-6.8","purlType":"deb","versions":[{"text":"< 6.8.0-1044.50~22.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.8.0-1044.50~22.04.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7935-1","label":"ubuntu.com/security/notices/USN-7935-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-21729","label":"ubuntu.com/security/CVE-2025-21729","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-37838","label":"ubuntu.com/security/CVE-2025-37838","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-37958","label":"ubuntu.com/security/CVE-2025-37958","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38118","label":"ubuntu.com/security/CVE-2025-38118","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38227","label":"ubuntu.com/security/CVE-2025-38227","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38352","label":"ubuntu.com/security/CVE-2025-38352","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38616","label":"ubuntu.com/security/CVE-2025-38616","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38666","label":"ubuntu.com/security/CVE-2025-38666","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-38678","label":"ubuntu.com/security/CVE-2025-38678","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-39964","label":"ubuntu.com/security/CVE-2025-39964","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-39993","label":"ubuntu.com/security/CVE-2025-39993","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-40018","label":"ubuntu.com/security/CVE-2025-40018","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-40300","label":"ubuntu.com/security/CVE-2025-40300","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2025-21729","CVE-2025-37838","CVE-2025-37958","CVE-2025-38118","CVE-2025-38227","CVE-2025-38352","CVE-2025-38616","CVE-2025-38666","CVE-2025-38678","CVE-2025-39964","CVE-2025-39993","CVE-2025-40018","CVE-2025-40300"],"downstream":[],"duplicates":[],"related":["CVE-2025-21729","CVE-2025-37838","CVE-2025-37958","CVE-2025-38118","CVE-2025-38227","CVE-2025-38352","CVE-2025-38616","CVE-2025-38666","CVE-2025-38678","CVE-2025-39964","CVE-2025-39993","CVE-2025-40018","CVE-2025-40300"]},"timeline":[{"kind":"published","date":"2025-12-15T23:35:24.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-20T10:46:04.409Z","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":"2026-10-20T13:13:06.502Z","stale":false,"partial":false}}