GSD-2021-1000558 Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails
A use-after-free vulnerability in the Linux Kernel Bluetooth CMTP module allows local attackers to cause denial of service or potentially 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
- None listed
What is GSD-2021-1000558?
GSD-2021-1000558 is an use after free vulnerability in Kernel, published on 4 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.9 by commit 3178e0a38f204a61ed4fe5739d6a4732879b34d1, it was introduced in version by commit . For more details please see the references link.
Which versions are affected by GSD-2021-1000558?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000558?
No fix has been published for GSD-2021-1000558 yet. Limit exposure of the affected software until one is available.
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 GSD-2021-1000558 being exploited?
There is no known exploitation of GSD-2021-1000558 in the wild and no public exploit code.