Answer in brief
CVE-2026-90408 records a High severity (CVSS 7.7) vulnerability in wifi: ath12k: fix overreads in ath12k_wmi_process_csa_switch_count_event(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <bf97c9d5123859a07848462539153176db029f3a || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <878654eb78c6aa0ff585baf1376567c775ca28ec | bf97c9d5123859a07848462539153176db029f3a, 878654eb78c6aa0ff585baf1376567c775ca28ec |
| Linux/Linuxgeneric | 6.3 | Not reported |
| Linux/Linuxgeneric | >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <23bed4ef132c55c9016f0c6122c8b8ba2efa2353 || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <bf97c9d5123859a07848462539153176db029f3a || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <878654eb78c6aa0ff585baf1376567c775ca28ec | 23bed4ef132c55c9016f0c6122c8b8ba2efa2353, bf97c9d5123859a07848462539153176db029f3a, 878654eb78c6aa0ff585baf1376567c775ca28ec |
| Linux/Linuxgeneric | >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <d4aec20f3a84634171c139ab2e02bb2e5a5c756b || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <24f7cdabea9f7ab95dbd6d8bc9ac6ec48d96a7e5 || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <23bed4ef132c55c9016f0c6122c8b8ba2efa2353 || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <bf97c9d5123859a07848462539153176db029f3a || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <878654eb78c6aa0ff585baf1376567c775ca28ec | d4aec20f3a84634171c139ab2e02bb2e5a5c756b, 24f7cdabea9f7ab95dbd6d8bc9ac6ec48d96a7e5, 23bed4ef132c55c9016f0c6122c8b8ba2efa2353, bf97c9d5123859a07848462539153176db029f3a, 878654eb78c6aa0ff585baf1376567c775ca28ec |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix overreads in ath12k_wmi_process_csa_switch_count_event() There is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so the parse infrastructure does not enforce a minimum length for the event struct. Additionally, the num_vdevs field is taken directly from firmware and used as a loop bound over the vdev_ids array without checking that it fits within the TLV payload. Either condition can cause an out-of-bounds read. Add a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so the parse infrastructure enforces a minimum length for the fixed-size event struct. Add a helper ath12k_wmi_tlv_data_len() to recover the payload length of a parsed TLV from the header preceding its data pointer. Use it in ath12k_wmi_process_csa_switch_count_event() to bound num_vdevs before the loop. Compile tested only.
Quoted source text, attributed separately from HOL analysis.