CVE-2021-47653 media: davinci: vpif: fix use-after-free on driver unbind
A use-after-free vulnerability in the Linux kernel's Davinci VPIF driver allows attackers to cause denial of service or execute code during driver unbind.
- 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-2021-47653?
CVE-2021-47653 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 2025. 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:
media: davinci: vpif: fix use-after-free on driver unbind
The driver allocates and registers two platform device structures during probe, but the devices were never deregistered on driver unbind.
This results in a use-after-free on driver unbind as the device structures were allocated using devres and would be freed by driver core when remove() returns.
Fix this by adding the missing deregistration calls to the remove() callback and failing probe on registration errors.
Note that the platform device structures must be freed using a proper release callback to avoid leaking associated resources like device names.
Weakness: CWE-416
Which versions are affected by CVE-2021-47653?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47653?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-47653 being exploited?
There is no known exploitation of CVE-2021-47653 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47653, GHSA-9rg5-7j22-7fqw, ROOT-OS-DEBIAN-11-CVE-2021-47653, UBUNTU-CVE-2021-47653.