{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80794",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80794"
  ],
  "published": "2026-09-04T15:14:07Z",
  "summary": "nfc: nci: fix uninit-value in the RF discover/activated NTF handlers",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix uninit-value in the RF discover/activated NTF handlers\n\nnci_rf_discover_ntf_packet() and nci_rf_intf_activated_ntf_packet() each\nparse a notification into an on-stack struct (nci_rf_discover_ntf /\nnci_rf_intf_activated_ntf) that is not initialised. The RF\ntechnology-specific parameters are only extracted when\nrf_tech_specific_params_len is non-zero, so a notification that reports a\nzero length leaves the rf_tech_specific_params union uninitialised - and\nboth handlers then pass it to nci_add_new_protocol(), which reads it:\n\n - discover:  nci_add_new_target() -> nci_add_new_protocol();\n - activated: nci_target_auto_activated() -> nci_add_new_protocol().\n\nnci_add_new_protocol() uses nfca_poll->nfcid1_len as both a branch\ncondition and a memcpy() length and copies nfcid1/sens_res/sel_res into\nndev->targets, which is later exposed to user space via NFC_CMD_GET_TARGET.\n\n  BUG: KMSAN: uninit-value in nci_add_new_protocol+0x624/0x6c0\n   nci_add_new_protocol+0x624/0x6c0\n   nci_ntf_packet+0x25b2/0x3c30\n   nci_rx_work+0x318/0x5d0\n   process_scheduled_works+0x84b/0x17a0\n   worker_thread+0xc10/0x11b0\n   kthread+0x376/0x500\n  Local variable ntf.i created at:\n   nci_ntf_packet+0xbc2/0x3c30\n\nZero-initialise both on-stack notifications so the union reads back as\nzero when no technology-specific parameters are present.",
  "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": "6.1.185",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80794"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1007a6b429d756513abd25bd00290908f2e89a4a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4bda9ef8392710f21e99027467f3f4afdfb5c99a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fe69fed3495f676578d49414a069ad7d8468e2ce"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7489f59d1ea2d3298aa41de7baf193e5e6e132f6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7086dab72b3ed95df96842801e10e935cfeb27a3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0d4b5cfab6891a5ca0f6aef209beebba4bd7c095"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5bd00c0e1470d90d77a7c60242854257ddf14e00"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d6f743d3d388913135681cde051c08823730194f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8cbe06c1e699c0a165dae5093a2550e65f914818"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-04T15:14:07Z"
  }
}