CVE-2025-37796 wifi: at76c50x: fix use after free access in at76_disconnect
A use-after-free vulnerability in the Linux kernel's at76c50x WiFi driver allows attackers to potentially execute code or cause a 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-2025-37796?
CVE-2025-37796 is a high-severity use after free vulnerability in Linux kernel, published on 1 May 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:
wifi: at76c50x: fix use after free access in at76_disconnect
The memory pointed to by priv is freed at the end of at76_delete_device function (using ieee80211_free_hw). But the code then accesses the udev field of the freed object to put the USB device. This may also lead to a memory leak of the usb device. Fix this by using udev from interface.
Weakness: CWE-416
Which versions are affected by CVE-2025-37796?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-37796?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-37796 being exploited?
There is no known exploitation of CVE-2025-37796 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-37796, DEBIAN-CVE-2025-37796, GHSA-7c48-pxh3-297c, ROOT-OS-DEBIAN-12-CVE-2025-37796, ROOT-OS-UBUNTU-2204-CVE-2025-37796, ROOT-OS-UBUNTU-2404-CVE-2025-37796 and 1 more.