GSD-2021-1000796 net/tls: Fix use-after-free after the TLS device goes down and up
A use-after-free vulnerability in the Linux kernel TLS subsystem allows attackers to cause denial of service or execute code when the TLS device state changes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000796?
GSD-2021-1000796 is an use after free vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net/tls: Fix use-after-free after the TLS device goes down and up
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 v5.12.10 by commit 0f1e6fe66977a864fe850522316f713d7b926fd9, it was introduced in version v4.18 by commit e8f69799810c32dd40c6724d829eccc70baad07f. For more details please see the references link.
Which versions are affected by GSD-2021-1000796?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000796?
No fix has been published for GSD-2021-1000796 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-2021-1000796 being exploited?
There is no known exploitation of GSD-2021-1000796 in the wild and no public exploit code.