{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80937",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-80937"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy\n\nmt7915_mcu_get_eeprom() copies a fixed EFUSE block into the driver's\ndev->mt76.eeprom.data buffer at the offset reported by the MCU response\n(res->addr, a device-controlled __le32) without checking it against the\nbuffer size. A malicious or malfunctioning device can report an arbitrary\naddress and drive a 16-byte out-of-bounds write past eeprom.data.\n\nReject a response whose address would place the copy outside eeprom.data\nbefore deriving the destination pointer. Devices that echo the requested\nin-bounds offset are unaffected.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80937"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/394e8cb56fc732d71041599cdb4e01f82cfd11c5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5fdaf7016d7684ef756a229fd5d96b4a140eeb40"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5f48b0d752a76590e2c613aae5345c2474627d1b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/44b5adfe49499f53002737f5fe81d608c08122fc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-03T11:04:09Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The OOB write is driven by a MediaTek Wi-Fi 6 MCU EFUSE query response (mt7915/mt7916/mt7981/mt7986), not a routed IP service; the highest reasonable exposure is an adjacent attacker who can drive malicious firmware or device behavior on the local radio.\nAC:L - A malicious MCU response can set an arbitrary res->addr and 16 device-controlled payload bytes; the host then memcpy's MT7915_EEPROM_BLOCK_SIZE bytes to eeprom.data+addr with no race or other condition beyond attacker control.\nPR:N - MCU EEPROM responses are consumed in mt7915_eeprom_load() during driver bring-up with no OS credential, capability, or Wi-Fi authentication check; an adjacent attacker needs no local account.\nUI:N - The copy runs automatically in mt7915_eeprom_load() during pci_probe/platform probe after firmware load; no victim action such as mounting a filesystem or opening a file is required.\nS:U - The write corrupts host kernel heap around the mt76 EEPROM buffer and is standard kernel memory corruption, not a VM escape, IOMMU bypass, or other crossed security authority.\nC:H - Attacker-controlled destination offset and payload are kernel memory corruption that can overwrite adjacent objects and pointers and be leveraged for information disclosure, so confidentiality impact is high.\nI:H - Sixteen bytes of device-controlled data are written at a device-chosen offset past the 3584/4096-byte eeprom.data allocation, an out-of-bounds write primitive that can yield arbitrary kernel writes or control-flow hijacking.\nA:H - An unbounded kernel heap write during EEPROM init can oops, panic, or hang the host, a high availability impact on Wi-Fi 6 APs, routers, and workstations."
    }
  }
}