GSD-2023-1000436 ext4: fix corruption when online resizing a 1K bigalloc fs
Local attackers with high privileges can cause filesystem corruption and denial of service by online resizing a 1K bigalloc ext4 filesystem.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2023-1000436?
GSD-2023-1000436 is a denial of service vulnerability in Kernel, published on 17 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
ext4: fix corruption when online resizing a 1K bigalloc fs
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 v6.0.18 by commit 2a95fd8f623a25f532eea4d3ec6bde193fcf0c28, it was introduced in version v4.15 by commit d77147ff443b255d82c907a632c825b2cc610b10. For more details please see the references link.
Which versions are affected by GSD-2023-1000436?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1000436?
No fix has been published for GSD-2023-1000436 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-2023-1000436 being exploited?
There is no known exploitation of GSD-2023-1000436 in the wild and no public exploit code.