{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20"
            },
            {
              "fixed": "1007a6b429d756513abd25bd00290908f2e89a4a"
            },
            {
              "fixed": "4bda9ef8392710f21e99027467f3f4afdfb5c99a"
            },
            {
              "fixed": "fe69fed3495f676578d49414a069ad7d8468e2ce"
            },
            {
              "fixed": "7489f59d1ea2d3298aa41de7baf193e5e6e132f6"
            },
            {
              "fixed": "7086dab72b3ed95df96842801e10e935cfeb27a3"
            },
            {
              "fixed": "0d4b5cfab6891a5ca0f6aef209beebba4bd7c095"
            },
            {
              "fixed": "5bd00c0e1470d90d77a7c60242854257ddf14e00"
            },
            {
              "fixed": "d6f743d3d388913135681cde051c08823730194f"
            },
            {
              "fixed": "8cbe06c1e699c0a165dae5093a2550e65f914818"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.3.0"
            },
            {
              "fixed": "5.10.269"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.218"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.185"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.154"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.106"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80794.json"
  },
  "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() -\u003e nci_add_new_protocol();\n - activated: nci_target_auto_activated() -\u003e nci_add_new_protocol().\n\nnci_add_new_protocol() uses nfca_poll-\u003enfcid1_len as both a branch\ncondition and a memcpy() length and copies nfcid1/sens_res/sel_res into\nndev-\u003etargets, 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.",
  "id": "CVE-2026-80794",
  "modified": "2026-09-06T03:30:55.120934067Z",
  "published": "2026-09-04T15:13:07.169Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d4b5cfab6891a5ca0f6aef209beebba4bd7c095"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1007a6b429d756513abd25bd00290908f2e89a4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bda9ef8392710f21e99027467f3f4afdfb5c99a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bd00c0e1470d90d77a7c60242854257ddf14e00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7086dab72b3ed95df96842801e10e935cfeb27a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7489f59d1ea2d3298aa41de7baf193e5e6e132f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cbe06c1e699c0a165dae5093a2550e65f914818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6f743d3d388913135681cde051c08823730194f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe69fed3495f676578d49414a069ad7d8468e2ce"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80794.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80794"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nfc: nci: fix uninit-value in the RF discover/activated NTF handlers"
}