GSD-2021-1000817 btrfs: fix fsync failure and transaction abort after writes to prealloc extents
A local attacker can cause a filesystem transaction abort and fsync failure by writing to preallocated extents in the btrfs filesystem.
- 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-2021-1000817?
GSD-2021-1000817 is a denial of service vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
btrfs: fix fsync failure and transaction abort after writes to prealloc extents
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 v5.12.10 by commit b37885cc013516f0412d7d2e99f043dd112c99a6, it was introduced in version by commit . For more details please see the references link.
Which versions are affected by GSD-2021-1000817?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000817?
No fix has been published for GSD-2021-1000817 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2021-1000817 being exploited?
There is no known exploitation of GSD-2021-1000817 in the wild and no public exploit code.