CVE-2024-53063 media: dvbdev: prevent the risk of out of memory access
A missing boundary check in the Linux kernel DVB subsystem can lead to out-of-memory access and denial of service when dynamic minors are disabled.
- 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-2024-53063?
CVE-2024-53063 is a high-severity denial of service vulnerability in Linux kernel, published on 19 Nov 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:
media: dvbdev: prevent the risk of out of memory access
The dvbdev contains a static variable used to store dvb minors.
The behavior of it depends if CONFIG_DVB_DYNAMIC_MINORS is set or not. When not set, dvb_register_device() won't check for boundaries, as it will rely that a previous call to dvb_register_adapter() would already be enforcing it.
On a similar way, dvb_device_open() uses the assumption that the register functions already did the needed checks.
This can be fragile if some device ends using different calls. This also generate warnings on static check analysers like Coverity.
So, add explicit guards to prevent potential risk of OOM issues.
Weakness: CWE-755
Which versions are affected by CVE-2024-53063?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53063?
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-2024-53063 being exploited?
There is no known exploitation of CVE-2024-53063 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53840, AZL-53936, BELL-CVE-2024-53063, DEBIAN-CVE-2024-53063, GHSA-7hwj-x2vh-jqv9, UBUNTU-CVE-2024-53063.