CVE-2026-23315 wifi: mt76: Fix possible oob access in mt76_connac2_mac_write_txwi_80211()
An out-of-bounds access in the mt76 WiFi driver allows attackers to cause a denial of service or potentially execute code via crafted frames.
- 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-2026-23315?
CVE-2026-23315 is a high-severity memory corruption vulnerability in Linux kernel, published on 25 Mar 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: mt76: Fix possible oob access in mt76_connac2_mac_write_txwi_80211()
Check frame length before accessing the mgmt fields in mt76_connac2_mac_write_txwi_80211 in order to avoid a possible oob access.
[fix check to also cover mgmt->u.action.u.addba_req.capab, correct Fixes tag]
Weakness: CWE-125
Which versions are affected by CVE-2026-23315?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23315?
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-2026-23315 being exploited?
There is no known exploitation of CVE-2026-23315 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-80558, BELL-CVE-2026-23315, DEBIAN-CVE-2026-23315, GHSA-pr34-f48h-6946, ROOT-OS-DEBIAN-11-CVE-2026-23315, ROOT-OS-DEBIAN-12-CVE-2026-23315 and 4 more.