{"id":"CVE-2026-98729","summary":"x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mm: Don't apply va_align to hugetlb mappings on AMD F15h\n\nget_align_mask() returns huge_page_mask_align() for hugetlbfs, but get_align_bits()\nadds va_align.bits regardless, so vm_unmapped_area() returns an address off the huge\npage boundary and __unmap_hugepage_range() hits BUG_ON(start & ~huge_page_mask(h)) at\nteardown.\n\nThis can be triggered on Carrizo and FX-8370E, both hstates.\n\nPass the file to get_align_bits() and skip the randomisation for hugetlbfs.\n\n  [ bp: Massage commit message. ]","modified":"2026-10-19T02:47:15.248720806Z","published":"2026-10-18T15:47:06.633Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98729.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fe23680e6f1d52b8cc45d77bf7c54249508a81c7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98729.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98729"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0"},{"fixed":"fe23680e6f1d52b8cc45d77bf7c54249508a81c7"},{"fixed":"b46b2e2de47ca9449532b0a7110ed99f79061d6e"},{"fixed":"d2457a7e2727dc747a61a50d65c2f259afce8c45"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98729.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98729.json"}}],"schema_version":"1.9.0"}