CVE-2021-47495 usbnet: sanity check for maxpacket
A missing sanity check for maxpacket in the Linux kernel usbnet driver causes a division by zero, leading to a system crash.
- 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-2021-47495?
CVE-2021-47495 is a medium-severity vulnerability in Linux kernel, published on 22 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:
usbnet: sanity check for maxpacket
maxpacket of 0 makes no sense and oopses as we need to divide by it. Give up.
V2: fixed typo in log and stylistic issues
Weakness: CWE-369
Which versions are affected by CVE-2021-47495?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47495?
Apply the vendor's patch.
Is CVE-2021-47495 being exploited?
There is no known exploitation of CVE-2021-47495 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47495, GHSA-rj64-24f8-r32g, UBUNTU-CVE-2021-47495.