CVE-2026-93807 wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers
An attacker within WiFi range can read out-of-bounds memory from the kernel by exploiting a flaw in the RSI WiFi driver's key handling logic.
- 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-2026-93807?
CVE-2026-93807 is a vulnerability in Linux, published on 24 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: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers
rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and data[24] whenever key data is present. Those offsets are only part of the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as CCMP, do not provide those bytes, so the unconditional copies can read past the supplied key buffer.
Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are shorter than the expected 32-byte layout.
[drop useless length check]
Which versions are affected by CVE-2026-93807?
How do I fix CVE-2026-93807?
Apply the vendor's patch.
Is CVE-2026-93807 being exploited?
There is no known exploitation of CVE-2026-93807 in the wild and no public exploit code.
Sources
Also known as AZL-103649, BELL-CVE-2026-93807, DEBIAN-CVE-2026-93807, GHSA-3mp2-v334-gxv5, UBUNTU-CVE-2026-93807.