CVE-2026-93166 wifi: rtw89: debug: fix off by on in rtw89_ppdu_str()
An off-by-one error in the rtw89 WiFi driver allows out-of-bounds access, potentially leading to system crashes or code execution for local attackers.
- 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-2026-93166?
CVE-2026-93166 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. 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: rtw89: debug: fix off by on in rtw89_ppdu_str()
This > comparison should be >= to avoid an out of bounds access.
Which versions are affected by CVE-2026-93166?
How do I fix CVE-2026-93166?
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-2026-93166 being exploited?
There is no known exploitation of CVE-2026-93166 in the wild and no public exploit code.
Sources
Also known as GHSA-q2xx-cj9c-6f23, UBUNTU-CVE-2026-93166.