CVE-2023-54194

A memory allocation failure was found in the exFAT filesystem driver. When system memory is fragmented, kmalloc_array() can fail to allocate contiguous memory for the bitmap, preventing USB drives from being mounted.

This is an availability issue affecting exFAT filesystem mounting under memory pressure. The fix uses kvmalloc_array() which falls back to vmalloc when contiguous memory is unavailable. No security boundary is crossed.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.