CVE-2024-56716 netdevsim: prevent bad user input in nsim_dev_health_break_write()
A local attacker can crash the Linux kernel by providing invalid input to the netdevsim health break write function.
- 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-2024-56716?
CVE-2024-56716 is a medium-severity denial of service vulnerability in Linux kernel, published on 29 Dec 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:
netdevsim: prevent bad user input in nsim_dev_health_break_write()
If either a zero count or a large one is provided, kernel can crash.
Weakness: CWE-1284
Which versions are affected by CVE-2024-56716?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-56716?
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-2024-56716 being exploited?
There is no known exploitation of CVE-2024-56716 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-55401, AZL-55412, BELL-CVE-2024-56716, DEBIAN-CVE-2024-56716, GHSA-8896-pxp4-28pj, UBUNTU-CVE-2024-56716.