CVE-2026-72093
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
In the Linux kernel, the accel/amdxdna module has a use-after-free bug in amdxdna_gem_dmabuf_mmap(). When vm_insert_pages() fails, the error path calls close, which releases the GEM object, and then the code releases it again, leading to access to freed memory. The fix returns directly from close_vma.
Risk Assessment
The risk includes potential memory corruption or remote code execution, which could lead to system compromise.
Recommendation
It is recommended to urgently apply the Linux kernel patch that eliminates the double free of the GEM object.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap() When vm_insert_pages() fails, the error path calls vma->vm_ops->close(vma) which internally calls drm_gem_vm_close() → drm_gem_object_put(), releasing the GEM object reference acquired at the start of the function. However, the close_vma label then falls through to put_obj, which calls drm_gem_object_put() a second time on the same object. If the first put releases the last reference, the object is freed and the second put accesses freed memory, causing a use-after-free. Fix by returning directly from close_vma instead of falling through to put_obj, since the close handler already performs all necessary cleanup including the object put.