Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3
- https://git.kernel.org/stable/c/63f443384979563f16f70420f4fa85bba31238ca
- https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d
FAQ
What is CVE-2026-74420?
CVE-2026-74420 is a documented vulnerability. 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 str...
How severe is CVE-2026-74420?
CVSS scoring is not yet available for CVE-2026-74420. Check NVD for updates.
Is there a patch for CVE-2026-74420?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.