GSD-2021-1000201 btrfs: fix deadlock when cloning inline extents and using qgroups
A deadlock in the btrfs filesystem when cloning inline extents with qgroups enabled can cause a local denial of service.
- 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-2021-1000201?
GSD-2021-1000201 is a denial of service 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
btrfs: fix deadlock when cloning inline extents and using qgroups
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 v5.12.5 by commit 96157707c0420e3d3edfe046f1cc797fee117ade, it was introduced in version v5.9 by commit c53e9653605dbf708f5be02902de51831be4b009. For more details please see the references link.
Which versions are affected by GSD-2021-1000201?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000201?
No fix has been published for GSD-2021-1000201 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-2021-1000201 being exploited?
There is no known exploitation of GSD-2021-1000201 in the wild and no public exploit code.