wifi: ath12k: fix stride mismatch in mac_phy_caps_parse()

{
  "id": "46b7a16ea0e0df8af55bc778528453771fbcce5158a5ac875929d55a86991ecd",
  "url": "https://osv.dev/vulnerability/CVE-2026-90399",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: ath12k: fix stride mismatch in mac_phy_caps_parse()",
    "summary": "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",
    "evidence": "osv:CVE-2026-90399",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.6.160",
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            "evidence": "/affected/1/ranges"
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-90399",
      "aliases": [
        "CVE-2026-90399"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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      "modified": "2026-10-28T02:30:25.049083821Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f",
        "https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081",
        "https://git.kernel.org/stable/c/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f",
        "https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a",
        "https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90399.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90399",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90399.json"
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    "related_cves": [
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        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 491670,
  "published_at": "2026-09-17T16:09:30.273+00:00"
}