CVE-2025-40141 Bluetooth: ISO: Fix possible UAF on iso_conn_free
A use-after-free vulnerability in the Linux kernel's Bluetooth ISO subsystem allows attackers to potentially execute arbitrary code or escalate privileges.
- 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-2025-40141?
CVE-2025-40141 is a high-severity use after free vulnerability in Linux, published on 12 Nov 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:
Bluetooth: ISO: Fix possible UAF on iso_conn_free
This attempt to fix similar issue to sco_conn_free where if the conn->sk is not set to NULL may lead to UAF on iso_conn_free.
Which versions are affected by CVE-2025-40141?
How do I fix CVE-2025-40141?
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-2025-40141 being exploited?
There is no known exploitation of CVE-2025-40141 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-40141, DEBIAN-CVE-2025-40141, GHSA-rr62-6cpm-ww8h, ROOT-OS-DEBIAN-13-CVE-2025-40141, ROOT-OS-UBUNTU-2404-CVE-2025-40141, UBUNTU-CVE-2025-40141.