CVE-2026-74420

Summary

In 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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux99624bdff8670795b678eafa6509aaad3a5c0175 < 353f26c74660bcbd8d82cd76622748e14a5a5db3affected
LinuxLinux99624bdff8670795b678eafa6509aaad3a5c0175 < 63f443384979563f16f70420f4fa85bba31238caaffected
LinuxLinux99624bdff8670795b678eafa6509aaad3a5c0175 < b82a225e57a334335a21462b75ee2223bc6efe6daffected
LinuxLinux6.15affected
LinuxLinux0 < 6.15unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References