CVE-2026-90399

{
  "id": "CVE-2026-90399",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:17:39.643",
  "lastModified": "2026-10-21T13:20:53.897",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix stride mismatch in mac_phy_caps_parse()\n\nCurrently, in ath12k_wmi_mac_phy_caps_parse(), kzalloc() sizes the\nmac_phy_caps buffer as tot_phy_id * len, where len is clamped to\nmin(firmware_len, sizeof(struct ath12k_wmi_mac_phy_caps_params)). The\nsubsequent memcpy() destination advances by sizeof(full struct) per slot\nvia C pointer arithmetic, not by the clamped len. When firmware sends\nshort TLVs, the second and later slots are written past the end of the\nallocation.\n\nThe reader in ath12k_pull_mac_phy_cap_svc_ready_ext() also indexes the\nbuffer with full-struct pointer arithmetic, so the allocation must match\nthat stride.\n\nFix by using kzalloc_objs(), which derives the element size from the\npointer type, making allocation size and pointer stride provably\nconsistent regardless of what len the firmware provides.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/wmi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
              "lessThan": "79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
              "lessThan": "d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
              "lessThan": "b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
              "lessThan": "26f8f87f0a556e7984366c64cebc16d49e15d22f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
              "lessThan": "4c6eb712a91fa079be6f9f1419c96e0ad2227081",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/wmi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.3",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.52",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.6",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}