GSD-2021-1000440 net/nfc: fix use-after-free llcp_sock_bind/connect
A use-after-free vulnerability in the Linux Kernel NFC subsystem 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-2021-1000440?
GSD-2021-1000440 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 v5.4.119 by commit e32352070bcac22be6ed8ab635debc280bb65b8c, it was introduced in version v5.4.112 by commit c89903c9eff219a4695e63715cf922748d743f65. For more details please see the references link.
Which versions are affected by GSD-2021-1000440?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000440?
No fix has been published for GSD-2021-1000440 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-2021-1000440 being exploited?
There is no known exploitation of GSD-2021-1000440 in the wild and no public exploit code.