CVE-2026-98729
Description
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h get_align_mask() returns huge_page_mask_align() for hugetlbfs, but get_align_bits() adds va_align.bits regardless, so vm_unmapped_area() returns an address off the huge page boundary and __unmap_hugepage_range() hits BUG_ON(start & ~huge_page_mask(h)) at teardown. This can be triggered on Carrizo and FX-8370E, both hstates. Pass the file to get_align_bits() and skip the randomisation for hugetlbfs. [ bp: Massage commit message. ]
How to fix
- Linux Linuxfe23680e6f1d52b8cc45d77bf7c54249508a81c7, b46b2e2de47ca9449532b0a7110ed99f79061d6e, d2457a7e2727dc747a61a50d65c2f259afce8c45 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 ≤ v < fe23680e6f1d52b8cc45d77bf7c54249508a81c7, 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 ≤ v < b46b2e2de47ca9449532b0a7110ed99f79061d6e, 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 ≤ v < d2457a7e2727dc747a61a50d65c2f259afce8c45, 6.13 | fe23680e6f1d52b8cc45d77bf7c54249508a81c7, b46b2e2de47ca9449532b0a7110ed99f79061d6e, d2457a7e2727dc747a61a50d65c2f259afce8c45 |
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