What happened
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check.
Affected versions
Linux: aac243092b707bb3018e951d470cc1a9bcbaba6c through before 93fa3e925b15b0ded0a549fe7f12bfbb1c4e171a (git); aac243092b707bb3018e951d470cc1a9bcbaba6c through before 52f3e086760a9a3e02a46a10b57caffd73b1c204 (git); aac243092b707bb3018e951d470cc1a9bcbaba6c through before b3709d354545e70388177500761f92d906c4dfd6 (git); 6.14 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.