wifi: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()

Summary

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.

Timeline

1. Sep 17, 2026, 4:10 PM UTCCVE published
2. Oct 19, 2026, 9:04 AM UTCRecord last updated

Affected versions

• Linux Linux

  From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 20166fd9a4ad15d7eccc63c9dc99680aea6558ef; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 71690d26c1415e816158b45ee354367244c50d4c; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in f9726f6d97dca94ab14739c8b632301a940a7e8f; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 2677fc48dd10dc08cdec99c2692d50fe5f48dcbf; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 9652e7e23137538169f60323300cae3413475685; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 72a5e45f606ec454ef556a68ffd92e06b0677f44; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 9ddbc95dac167e3f2d0e3859e6ce022ae0184fc1; From d5c65159f2895379e11ca13f62feabe93278985d · fixed in 9ef9dd30058cc9223c72f711dca1a28a5947d0c5

• Linux Linux

  5.6

• KernelLinux

  From 5.6.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8