{"schemaVersion":3,"id":"USN-7874-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux-fips, linux-aws-fips, linux-gcp-fips 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  - HSI subsystem;\n  - I3C subsystem;\n  - SMB network file system;\n  - Padata parallel execution mechanism;\n  - Timer subsystem;\n  - Networking core;\n(CVE-2023-52854, CVE-2024-35867, CVE-2024-50061, CVE-2024-56664,\nCVE-2025-21727, CVE-2025-37838, CVE-2025-38352)","dates":{"published":"2025-11-19T17:27:37.000Z","modified":"2026-10-17T12:54:27.780Z","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-aws-fips","name":"linux-aws-fips","label":"linux-aws-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws-fips","purlType":"deb","versions":[{"text":"< 5.4.0-1152.162+fips1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1152.162+fips1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-fips","name":"linux-fips","label":"linux-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-fips","purlType":"deb","versions":[{"text":"< 5.4.0-1126.136","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1126.136","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-fips","name":"linux-gcp-fips","label":"linux-gcp-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-fips","purlType":"deb","versions":[{"text":"< 5.4.0-1155.164+fips1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1155.164+fips1","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7874-2","label":"ubuntu.com/security/notices/USN-7874-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-52854","label":"ubuntu.com/security/CVE-2023-52854","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-35867","label":"ubuntu.com/security/CVE-2024-35867","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-50061","label":"ubuntu.com/security/CVE-2024-50061","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-56664","label":"ubuntu.com/security/CVE-2024-56664","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-21727","label":"ubuntu.com/security/CVE-2025-21727","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-2025-38352","label":"ubuntu.com/security/CVE-2025-38352","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-2023-52854","CVE-2024-35867","CVE-2024-50061","CVE-2024-56664","CVE-2025-21727","CVE-2025-37838","CVE-2025-38352","CVE-2025-40300"],"downstream":[],"duplicates":[],"related":["CVE-2023-52854","CVE-2024-35867","CVE-2024-50061","CVE-2024-56664","CVE-2025-21727","CVE-2025-37838","CVE-2025-38352","CVE-2025-40300"]},"timeline":[{"kind":"published","date":"2025-11-19T17:27:37.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-17T12:54:27.780Z","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":"2026-10-19T18:08:56.550Z","stale":false,"partial":false}}