GSD-2021-1002789 hamradio: defer ax25 kfree after unregister_netdev
A use-after-free vulnerability in the Linux kernel hamradio AX.25 subsystem was fixed by deferring memory freeing after network device unregistration.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is GSD-2021-1002789?
GSD-2021-1002789 is an use after free vulnerability in Kernel, published on 30 Dec 2021.
Official description
hamradio: defer ax25 kfree after unregister_netdev
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 v4.19.223 by commit 896193a02a2981e60c40d4614fd095ce92135ccd. For more details please see the references link.
Which versions are affected by GSD-2021-1002789?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002789?
No fix has been published for GSD-2021-1002789 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-2021-1002789 being exploited?
There is no known exploitation of GSD-2021-1002789 in the wild and no public exploit code.