In the Linux kernel, the following vulnerability has been resolved:
iommu/dma: Check atomic pool allocation result directly
The non-blocking, non-coherent allocation path uses dma_alloc_from_pool(),
which returns the allocated page and fills cpu_addr only on success.
Do not rely on cpu_addr to detect allocation failure in this path. Check
the returned page directly before using it for the IOMMU mapping.
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 8
https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291
416baaa9-dc9f-4396-8d5f-8c081fb06d67