What’s Vulnerable › Vulnerabilities

CVE-2026-74420: drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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.

Affected products

• Linux kernel: 6.15 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3
• https://git.kernel.org/stable/c/63f443384979563f16f70420f4fa85bba31238ca
• https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d

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