GSD-2021-1001491 mISDN: fix possible use-after-free in HFC_cleanup()
A use-after-free vulnerability in the mISDN HFC driver allows local attackers with high privileges to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001491?
GSD-2021-1001491 is an use after free vulnerability in Kernel, published on 3 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mISDN: fix possible use-after-free in HFC_cleanup()
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 v4.4.276 by commit 49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe. For more details please see the references link.
Which versions are affected by GSD-2021-1001491?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001491?
No fix has been published for GSD-2021-1001491 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-2021-1001491 being exploited?
There is no known exploitation of GSD-2021-1001491 in the wild and no public exploit code.