GSD-2021-1000226 mm: memcontrol: slab: fix obtain a reference to a freeing memcg
A use-after-free vulnerability in the Linux kernel memory control subsystem allows local attackers to potentially escalate privileges or cause a system crash.
- 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-2021-1000226?
GSD-2021-1000226 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
mm: memcontrol: slab: fix obtain a reference to a freeing memcg
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 v5.12.4 by commit c3ae6a3f3ca4f02f6ccddf213c027302586580d0, it was introduced in version v5.11 by commit 3de7d4f25a7438f09fef4e71ef111f1805cd8e7c. For more details please see the references link.
Which versions are affected by GSD-2021-1000226?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000226?
No fix has been published for GSD-2021-1000226 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-2021-1000226 being exploited?
There is no known exploitation of GSD-2021-1000226 in the wild and no public exploit code.