{"id":"CVE-2026-64151","summary":"iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommupt: Check for missing PAGE_SIZE in the pgsize_bitmap\n\nSashiko pointed out that the driver could drop PAGE_SIZE from the\npgsize_bitmap. That is technically allowed but nothing does it, and\nsuch an iommu_domain would not be used with the DMA API today.\n\nStill, it is against the design and it is trivial to fix up. Lift\nthe PT_WARN_ON to the if branch and just skip the fast path.","modified":"2026-07-22T05:29:59.104744275Z","published":"2026-07-19T15:40:40.643Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64151.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00850f41da24423587abd6124a790dd4f12bcef3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64151.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64151"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dcd6a011a8d523a114af2360a8753de5bd60c139"},{"fixed":"00850f41da24423587abd6124a790dd4f12bcef3"},{"fixed":"8ef3f77c440005c7f04229a75976bfc078364247"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64151.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64151.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"}]}