CVE-2025-71191 dmaengine: at_hdmac: fix device leak on of_dma_xlate()
A resource leak in the Linux kernel's at_hdmac DMA driver can lead to memory exhaustion and 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-2025-71191?
CVE-2025-71191 is a medium-severity vulnerability in Linux kernel, published on 31 Jan 2026. 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: at_hdmac: fix device leak on of_dma_xlate()
Make sure to drop the reference taken when looking up the DMA platform device during of_dma_xlate() when releasing channel resources.
Note that commit 3832b78b3ec2 ("dmaengine: at_hdmac: add missing put_device() call in at_dma_xlate()") fixed the leak in a couple of error paths but the reference is still leaking on successful allocation.
Which versions are affected by CVE-2025-71191?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-71191?
Apply the vendor's patch.
Is CVE-2025-71191 being exploited?
There is no known exploitation of CVE-2025-71191 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-71191, DEBIAN-CVE-2025-71191, GHSA-4c95-wpmq-cc75, ROOT-OS-DEBIAN-11-CVE-2025-71191, ROOT-OS-DEBIAN-12-CVE-2025-71191, ROOT-OS-DEBIAN-13-CVE-2025-71191 and 3 more.