CVE-2026-98185 wifi: mwifiex: validate scan response extents
An integer underflow in the mwifiex Wi-Fi driver allows attackers to trigger out-of-bounds memory access via crafted scan responses, potentially causing crashes or code execution.
- 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-2026-98185?
CVE-2026-98185 is a vulnerability in Linux, published on 6 Oct 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: mwifiex: validate scan response extents
mwifiex_ret_802_11_scan() subtracts the fixed response fields and the firmware-provided BSS length from resp->size without first proving that either extent fits. A short response or oversized BSS length can therefore underflow tlv_buf_size and make the TLV parser walk beyond the command response.
Compute the fixed extent from the selected normal or background scan response. Validate that the fixed fields and BSS data fit before deriving the TLV extent and entering the parser.
Which versions are affected by CVE-2026-98185?
How do I fix CVE-2026-98185?
Apply the vendor's patch.
Is CVE-2026-98185 being exploited?
There is no known exploitation of CVE-2026-98185 in the wild and no public exploit code.
Sources
Also known as AZL-106410, BELL-CVE-2026-98185, DEBIAN-CVE-2026-98185, GHSA-wqr3-9qxq-6r7p, UBUNTU-CVE-2026-98185.