CVE-2026-74301 Bluetooth: btmtk: fix URB leak in alloc_mtk_intr_urb error path
A memory leak in the Linux kernel Bluetooth driver allows local attackers to cause denial of service by exhausting kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74301?
CVE-2026-74301 is a memory corruption vulnerability in Linux, published on 15 Aug 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:
Bluetooth: btmtk: fix URB leak in alloc_mtk_intr_urb error path
When btmtk_isopkt_pad() fails, the previously allocated URB is not freed, leaking the urb structure. Add usb_free_urb() before returning the error.
Which versions are affected by CVE-2026-74301?
How do I fix CVE-2026-74301?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74301 being exploited?
There is no known exploitation of CVE-2026-74301 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74301, DEBIAN-CVE-2026-74301, GHSA-rg8m-vv3c-7gxv, UBUNTU-CVE-2026-74301.