CVE-2026-74716

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A locally exploitable issue exists in the amdxdna insert pages() function. The vm flags mod() function sets VM MIXEDMAP and clears VM PFNMAP. If an unprivileged userspace process maps a non-imported GEM object and calls madvise(MADV DONTNEED), the Page Table Entries (PTEs) are cleared. Subsequent memory access triggers drm gem shmem fault(), which attempts to map the backing shmem page via vmf insert pfn() and vmf insert pfn prot(). Since the backing shmem page is normal system memory and the Virtual Memory Area (VMA) has VM MIXEDMAP set, it triggers a BUG ON() assertion.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.