CVE-2022-50541 dmaengine: ti: k3-udma: Reset UDMA_CHAN_RT byte counters to prevent overflow
An integer overflow in the TI K3 UDMA driver causes indefinite hangs during large data transfers, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50541?
CVE-2022-50541 is a medium-severity vulnerability in Linux kernel, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: ti: k3-udma: Reset UDMA_CHAN_RT byte counters to prevent overflow
UDMA_CHAN_RT_*BCNT_REG stores the real-time channel bytecount statistics. These registers are 32-bit hardware counters and the driver uses these counters to monitor the operational progress status for a channel, when transferring more than 4GB of data it was observed that these counters overflow and completion calculation of a operation gets affected and the transfer hangs indefinitely.
This commit adds changes to decrease the byte count for every complete transaction so that these registers never overflow and the proper byte count statistics is maintained for ongoing transaction by the RT counters.
Earlier uc->bcnt used to maintain a count of the completed bytes at driver side, since the RT counters maintain the statistics of current transaction now, the maintenance of uc->bcnt is not necessary.
Which versions are affected by CVE-2022-50541?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-50541?
Apply the vendor's patch.
Is CVE-2022-50541 being exploited?
There is no known exploitation of CVE-2022-50541 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-50541, GHSA-wj9m-3v96-8v4j, ROOT-OS-DEBIAN-11-CVE-2022-50541, UBUNTU-CVE-2022-50541.