CVE-2022-50541

A counter-overflow flaw was found in the Linux kernel Texas Instruments K3 Universal Direct Memory Access (UDMA) driver. During long data transfers exceeding four gigabytes, the hardware byte-count registers could wrap and misreport progress, causing the transfer to hang indefinitely. A local user could use this flaw to cause a denial of service due to a stalled input/output operation.

The real-time byte counters used for tracking DMA progress were 32-bit values that overflowed during large transfers. The fix subtracts completed bytes after each transaction to prevent counter wrap and maintain accurate progress tracking.

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.

To mitigate this issue, prevent module ti_k3_udma from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.