CVE-2025-39794 ARM: tegra: Use I/O memcpy to write to IRAM
A null pointer dereference in the Linux kernel Tegra driver causes a crash when writing to IRAM, 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-2025-39794?
CVE-2025-39794 is a medium-severity vulnerability in Debian Debian Linux, published on 12 Sep 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:
ARM: tegra: Use I/O memcpy to write to IRAM
Kasan crashes the kernel trying to check boundaries when using the normal memcpy.
Which versions are affected by CVE-2025-39794?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-39794?
Apply the vendor's patch.
Is CVE-2025-39794 being exploited?
There is no known exploitation of CVE-2025-39794 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-67350, AZL-75113, BELL-CVE-2025-39794, DEBIAN-CVE-2025-39794, GHSA-m4vj-r234-c4jf, ROOT-OS-DEBIAN-11-CVE-2025-39794 and 4 more.