GSD-2021-1000723 ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
A bug in the ext4 filesystem's extent status cache handling can lead to a denial of service, requiring local access to exploit.
- 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-2021-1000723?
GSD-2021-1000723 is a denial of service vulnerability in Kernel, published on 24 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
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 v4.9.272 by commit 5b3a9a2be59478b013a430ac57b0f3d65471b071, it was introduced in version by commit . For more details please see the references link.
Which versions are affected by GSD-2021-1000723?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000723?
No fix has been published for GSD-2021-1000723 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-2021-1000723 being exploited?
There is no known exploitation of GSD-2021-1000723 in the wild and no public exploit code.