Answer in brief
CVE-2026-90399 records a Unknown severity vulnerability in wifi: ath12k: fix stride mismatch in mac_phy_caps_parse(). The current sources do not mark it as known exploited. The current feed maps 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.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <26f8f87f0a556e7984366c64cebc16d49e15d22f || >=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <4c6eb712a91fa079be6f9f1419c96e0ad2227081 | d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b, b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a, 26f8f87f0a556e7984366c64cebc16d49e15d22f, 4c6eb712a91fa079be6f9f1419c96e0ad2227081 |
| Linux/Linuxgeneric | 6.3 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 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 stride mismatch in mac_phy_caps_parse() Currently, in ath12k_wmi_mac_phy_caps_parse(), kzalloc() sizes the mac_phy_caps buffer as tot_phy_id * len, where len is clamped to min(firmware_len, sizeof(struct ath12k_wmi_mac_phy_caps_params)). The subsequent memcpy() destination advances by sizeof(full struct) per slot via C pointer arithmetic, not by the clamped len. When firmware sends short TLVs, the second and later slots are written past the end of the allocation. The reader in ath12k_pull_mac_phy_cap_svc_ready_ext() also indexes the buffer with full-struct pointer arithmetic, so the allocation must match that stride. Fix by using kzalloc_objs(), which derives the element size from the pointer type, making allocation size and pointer stride provably consistent regardless of what len the firmware provides. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3
Quoted source text, attributed separately from HOL analysis.