CVE-2021-43976 Denial of service in n/a
A local attacker with physical access can cause a denial of service in the Linux kernel via a crafted USB device triggering a panic in the mwifiex driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43976?
CVE-2021-43976 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 17 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel through 5.15.2, mwifiex_usb_recv in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker (who can connect a crafted USB device) to cause a denial of service (skb_over_panic).
Which versions are affected by CVE-2021-43976?
It affects 15 products.
Linux distribution packages (1)
kernel-source openSUSE:Tumbleweed | All versions | 5.15.6-1.3 |
Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware and 9 more.
How do I fix CVE-2021-43976?
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-2021-43976 being exploited?
There is no known exploitation of CVE-2021-43976 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-6606, DEBIAN-CVE-2021-43976, GHSA-5hhf-r7jg-wxx3, UBUNTU-CVE-2021-43976, openSUSE-SU-2024:11662-1.