{"id":"CVE-2026-98729","state":"PUBLISHED","title":"x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h","description":"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. ]","publishedAt":"2026-10-18T15:47:06.633Z","updatedAt":"2026-10-19T09:24:39.819Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"fe23680e6f1d52b8cc45d77bf7c54249508a81c7","versionType":"git"},{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"b46b2e2de47ca9449532b0a7110ed99f79061d6e","versionType":"git"},{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"d2457a7e2727dc747a61a50d65c2f259afce8c45","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/sys_x86_64.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/sys_x86_64.c"]}],"references":["https://git.kernel.org/stable/c/fe23680e6f1d52b8cc45d77bf7c54249508a81c7","https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e","https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98729.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98729","state":"PUBLISHED","datePublished":"2026-10-18T15:47:06.633Z","dateUpdated":"2026-10-19T09:24:39.819Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.366Z"},"containers":{"cna":{"title":"x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h","descriptions":[{"lang":"en","value":"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. ]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"fe23680e6f1d52b8cc45d77bf7c54249508a81c7","versionType":"git"},{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"b46b2e2de47ca9449532b0a7110ed99f79061d6e","versionType":"git"},{"version":"1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0","status":"affected","lessThan":"d2457a7e2727dc747a61a50d65c2f259afce8c45","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/sys_x86_64.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/sys_x86_64.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:24:39.819Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}