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Linux kernel before 6.6.157.1‑1 may read past Wi‑Fi buffer
published 1 month ago
Summary
The Linux kernel’s Wi‑Fi driver can read data beyond the end of a firmware buffer, which could cause a crash or allow unexpected behavior. Updating to a version newer than 6.6.157.1‑1 fixes the problem. Apply the latest kernel update to protect your systems.
What to do
- Update kernel to version 6.6.157.1-1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Azure Linux:3 | azure | kernel | <= 6.6.150.1-1 |
| Azure Linux:3 | – | kernel |
<= 6.6.152.1-1 < 6.6.157.1-1 Fix: upgrade to 6.6.157.1-1
|
Original advisory text
CVE-2026-92496 affecting package kernel for versions less than 6.6.157.1-1
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.
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.
References
Timeline
Published17 Sep 2026
Updated2 Oct 2026
First seen23 Sep 2026
Sources
AZL-102312 · OSV
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