CVE-2021-47347 wl1251: Fix possible buffer overflow in wl1251_cmd_scan
A buffer overflow in the wl1251 Wi-Fi driver allows attackers to execute arbitrary code or cause a system crash via crafted scan commands.
- 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-2021-47347?
CVE-2021-47347 is a high-severity memory corruption vulnerability in Linux kernel, published on 21 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:
wl1251: Fix possible buffer overflow in wl1251_cmd_scan
Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.
Weakness: CWE-120
Which versions are affected by CVE-2021-47347?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47347?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-47347 being exploited?
There is no known exploitation of CVE-2021-47347 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47347, GHSA-3gcc-j58h-xmv8, UBUNTU-CVE-2021-47347.