drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges

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Summary

CVECVE-2026-74420
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:44 UTC
Updated2026-08-15 06:22:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges VMAs marked with VM_IO or VM_PFNMAP are not backed by struct page objects, which GPUSVM requires in order to operate correctly. In particular, get_pages() relies on hmm_range_fault() to resolve struct pages for the target range. Attempting to create an SVM range on such VMAs results in repeated get_pages() failures and can lead to an infinite loop inside a driver’s page‑fault handler. Prevent this by rejecting ranges on VM_IO or VM_PFNMAP VMAs and returning -EIO.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 99624bdff8670795b678eafa6509aaad3a5c0175 353f26c74660bcbd8d82cd76622748e14a5a5db3 git Not specified
CNA Linux Linux affected 99624bdff8670795b678eafa6509aaad3a5c0175 63f443384979563f16f70420f4fa85bba31238ca git Not specified
CNA Linux Linux affected 99624bdff8670795b678eafa6509aaad3a5c0175 b82a225e57a334335a21462b75ee2223bc6efe6d git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/63f443384979563f16f70420f4fa85bba31238ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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