{"id":"CVE-2026-89448","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89448","summary":"iommu/vt-d: Force requesting ACS when tboot is enabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Force requesting ACS when tboot is enabled\n\nCurrently the conditions of requesting ACS in detect_intel_iommu()\ndon't include tboot, leading to a possible misconfiguration with ACS\ndisabled (e.g. due to user opts) while iommu is later forced on by\ntboot_force_iommu().\n\nFix it by checking tboot in detect_intel_iommu().","published":"2026-09-11T19:43:14.746Z","modified":"2026-09-14T03:46:02.874760233Z","cvss":{"score":9.3,"severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.109"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/45705a6bfdb283f7b3b509010fd617b72f942537"},{"type":"WEB","url":"https://git.kernel.org/stable/c/607432b2618b61df81134be0ef2562b8300c1216"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87bc611c6c98a41c00feb7b06b0c297dd141a2ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aaeb81241e802c86be69394f72d49fde3f861fbb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89448.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89448"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:46:02.874760233Z"}}