GSD-2021-1000490 net/nfc: fix use-after-free llcp_sock_bind/connect
A use-after-free vulnerability in the Linux Kernel NFC LLCP socket handling allows local attackers to potentially execute 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
- None listed
What is GSD-2021-1000490?
GSD-2021-1000490 is an use after free vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net/nfc: fix use-after-free llcp_sock_bind/connect
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 v4.4.269 by commit 26157c82ba756767b2bd66d28a71b1bc454447f6, it was introduced in version v4.4.267 by commit a1cdd18c49d23ec38097ac2c5b0d761146fc0109. For more details please see the references link.
Which versions are affected by GSD-2021-1000490?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000490?
No fix has been published for GSD-2021-1000490 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-2021-1000490 being exploited?
There is no known exploitation of GSD-2021-1000490 in the wild and no public exploit code.