CVE-2026-90357 wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
A use-after-free vulnerability in the Linux kernel mt7915 WiFi driver allows attackers to corrupt memory, potentially leading to code execution or system crashes.
- 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-2026-90357?
CVE-2026-90357 is a high-severity use after free 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: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
The flow is added to dev->twt_list before sending the agreement to the firmware, but the error path leaves it linked while flowid_mask is never set. The flow slot can then be reused and memset while still on the list, corrupting twt_list, and station removal leaves a dangling entry behind that mt7915_mac_twt_sched_list_add() later walks.
Which versions are affected by CVE-2026-90357?
How do I fix CVE-2026-90357?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-90357 being exploited?
There is no known exploitation of CVE-2026-90357 in the wild and no public exploit code.
Sources
Also known as AZL-103011, BELL-CVE-2026-90357, DEBIAN-CVE-2026-90357, GHSA-9px9-hrqm-cp96, UBUNTU-CVE-2026-90357.