Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f before 4e370b5289624f46a356dcc94f9f87025eaa6036; affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f before 5da885c39baa70f570a8be35a78e85a351f33918; affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f before 63bbf9ac5dde2ba85e7b39d0a0b7d540e6252ba4 |
| Linux / Linux | affected 6.16; unaffected 0 before 6.16; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.