The Linux kernel contained a vulnerability in the arm_ffa firmware interface where the PARTITION_INFO_GET_REGS operation trusted firmware-supplied indices when copying partition descriptors into a caller buffer. This lack of proper bounds checking allowed the copy loop to potentially write beyond the allocated array. The patch introduced validation to reject inconsistent counts or index progressions, preventing out-of-bounds memory writes. The fix also corrected the current index handling when exactly one descriptor was present in the first fragment.

This vulnerability could have allowed out-of-bounds memory writes during the copying of partition descriptors, potentially leading to memory corruption or instability in the kernel. No known exploits in the wild have been reported. The impact is limited to systems using the affected arm_ffa firmware interface in the Linux kernel.

This vulnerability has been fixed in the Linux kernel. Users should update to the latest kernel versions containing this patch. Since this is not a cloud service, remediation depends on applying the updated kernel. Patch status is not explicitly confirmed in the provided data; therefore, check the official Linux kernel advisories or vendor updates for the exact fixed versions and apply them accordingly.