{"id":"CVE-2026-98729","title":"x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h","summary":"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 reg…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < fe23680e6f1d52b8cc45d77bf7c54249508a81c7","Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < b46b2e2de47ca9449532b0a7110ed99f79061d6e","Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < d2457a7e2727dc747a61a50d65c2f259afce8c45","Linux 6.13"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:47:06.633Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98729","references":[{"url":"https://git.kernel.org/stable/c/fe23680e6f1d52b8cc45d77bf7c54249508a81c7"},{"url":"https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e"},{"url":"https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.506Z","slug":"CVE-2026-98729","body":"## Overview\n\nIn 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. ]\n\n## Affected\n\n- `Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < fe23680e6f1d52b8cc45d77bf7c54249508a81c7`\n- `Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < b46b2e2de47ca9449532b0a7110ed99f79061d6e`\n- `Linux >= 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 < d2457a7e2727dc747a61a50d65c2f259afce8c45`\n- `Linux 6.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}