GSD-2021-1002838 kfence: fix memory leak when cat kfence objects
A memory leak in the Linux kernel kfence subsystem allows local attackers to cause denial of service by reading kfence objects.
- 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-2021-1002838?
GSD-2021-1002838 is a memory corruption vulnerability in Kernel, published on 30 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
kfence: fix memory leak when cat kfence objects
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 v5.15.12 by commit 2f06c8293d27f6337f907042c602c9c953988c48, it was introduced in version v5.12 by commit 0ce20dd840897b12ae70869c69f1ba34d6d16965. For more details please see the references link.
Which versions are affected by GSD-2021-1002838?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002838?
No fix has been published for GSD-2021-1002838 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2021-1002838 being exploited?
There is no known exploitation of GSD-2021-1002838 in the wild and no public exploit code.