GSD-2021-1000911 gfs2: Fix use-after-free in gfs2_glock_shrink_scan
A use-after-free vulnerability in the Linux kernel's gfs2 filesystem allows local attackers to potentially escalate privileges or cause a system crash.
- 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-2021-1000911?
GSD-2021-1000911 is an use after free vulnerability in Kernel, published on 30 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
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 v5.4.127 by commit 86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d. For more details please see the references link.
Which versions are affected by GSD-2021-1000911?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000911?
No fix has been published for GSD-2021-1000911 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-2021-1000911 being exploited?
There is no known exploitation of GSD-2021-1000911 in the wild and no public exploit code.