CVE-2021-47287 driver core: auxiliary bus: Fix memory leak when driver_register() fail
A memory leak in the Linux kernel auxiliary bus driver registration can lead to resource exhaustion and 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
- Available
What is CVE-2021-47287?
CVE-2021-47287 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
driver core: auxiliary bus: Fix memory leak when driver_register() fail
If driver_register() returns with error we need to free the memory allocated for auxdrv->driver.name before returning from __auxiliary_driver_register()
Weakness: CWE-401
Which versions are affected by CVE-2021-47287?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47287?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47287 being exploited?
There is no known exploitation of CVE-2021-47287 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-g7gx-qmj4-gxrc, UBUNTU-CVE-2021-47287.