CVE-2026-92496 wifi: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()
A buffer overread in the ath11k Wi-Fi driver allows attackers to cause denial of service or leak kernel memory via crafted WMI events.
- 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-2026-92496?
CVE-2026-92496 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: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()
Currently, in ath11k_wmi_tlv_op_rx(), the firmware buffer is read without first verifying that the buffer has enough data to hold a header. This could result in a buffer overread.
Add an upfront length check before dereferencing skb->data as a wmi_cmd_hdr. The check is placed before the trace_ath11k_wmi_event() call to preserve the existing trace semantics (tracing the full raw WMI event including the header), unlike the analogous ath12k fix which could use skb_pull_data() directly.
Compile tested only.
Which versions are affected by CVE-2026-92496?
How do I fix CVE-2026-92496?
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-2026-92496 being exploited?
There is no known exploitation of CVE-2026-92496 in the wild and no public exploit code.
Sources
Also known as AZL-102312, BELL-CVE-2026-92496, DEBIAN-CVE-2026-92496, GHSA-wjrg-9vr2-cwjq, UBUNTU-CVE-2026-92496.