CVE-2023-53257 wifi: mac80211: check S1G action frame size
A missing size check in the Linux kernel's mac80211 Wi-Fi subsystem allows attackers to cause a denial of service via malformed S1G action frames.
- 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-2023-53257?
CVE-2023-53257 is a high-severity denial of service vulnerability in Linux kernel, published on 15 Sep 2025. 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:
wifi: mac80211: check S1G action frame size
Before checking the action code, check that it even exists in the frame.
Which versions are affected by CVE-2023-53257?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53257?
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-2023-53257 being exploited?
There is no known exploitation of CVE-2023-53257 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53257, DEBIAN-CVE-2023-53257, GHSA-5qfv-wj98-fqxv, ROOT-OS-DEBIAN-11-CVE-2023-53257, UBUNTU-CVE-2023-53257.