What’s Vulnerable › Vulnerabilities

CVE-2026-92496: wifi: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.6 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/20166fd9a4ad15d7eccc63c9dc99680aea6558ef
• https://git.kernel.org/stable/c/2677fc48dd10dc08cdec99c2692d50fe5f48dcbf
• https://git.kernel.org/stable/c/71690d26c1415e816158b45ee354367244c50d4c
• https://git.kernel.org/stable/c/72a5e45f606ec454ef556a68ffd92e06b0677f44
• https://git.kernel.org/stable/c/9652e7e23137538169f60323300cae3413475685
• https://git.kernel.org/stable/c/9ddbc95dac167e3f2d0e3859e6ce022ae0184fc1
• https://git.kernel.org/stable/c/9ef9dd30058cc9223c72f711dca1a28a5947d0c5
• https://git.kernel.org/stable/c/f9726f6d97dca94ab14739c8b632301a940a7e8f

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