In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: Return the correct value in vmw_translate_ptr functions
Before the referenced fixes these functions used a lookup function that
returned a pointer. This was changed to another lookup function that
returned an error code with the pointer becoming an out parameter. The error path when the lookup failed was not changed to reflect this
change and the code continued to return the PTR_ERR of the now
uninitialized pointer.
This could cause the vmw_translate_ptr functions
to return success when they actually failed causing further uninitialized
and OOB accesses.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 6
https://git.kernel.org/stable/c/149f028772fa2879d9316b924ce948a6a0877e45
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/36cb28b6d303a81e6ed4536017090e85e0143e42
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5023ca80f9589295cb60735016e39fc5cc714243
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/531f45589787799aa81b63e1e1f8e71db5d93dd1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7e55d0788b362c93660b80cc5603031bbbdefa98
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ce3a5cf139787c186d5d54336107298cacaad2b9
416baaa9-dc9f-4396-8d5f-8c081fb06d67