GSD-2021-1001211 fbmem: Do not delete the mode that is still in use
A use-after-free vulnerability in the Linux kernel framebuffer memory subsystem allows local attackers to cause denial of service or potentially escalate privileges.
- 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-2021-1001211?
GSD-2021-1001211 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
fbmem: Do not delete the mode that is still in use
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 v5.13.4 by commit d6e76469157d8f240e5dec6f8411aa8d306b1126, it was introduced in version v5.3 by commit 13ff178ccd6d3b8074c542a911300b79c4eec255. For more details please see the references link.
Which versions are affected by GSD-2021-1001211?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001211?
No fix has been published for GSD-2021-1001211 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-2021-1001211 being exploited?
There is no known exploitation of GSD-2021-1001211 in the wild and no public exploit code.