{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2c66daecc4092e6049673c281b2e6f0d5e59a94c"
            },
            {
              "fixed": "9ba6bb09e00b922d902f684f575779e5433fe6e3"
            },
            {
              "fixed": "f83b399aa05a0712e3b1569a30d3d90b3533d2ef"
            },
            {
              "fixed": "20663102c14566e900e1d2f679e30b7f1694f387"
            },
            {
              "fixed": "2819f34e08bdffb6f06a51c67948ec5737fb166a"
            },
            {
              "fixed": "1bec5698b55aa2be5c3b983dba657c01d0fd3dbc"
            },
            {
              "fixed": "5a59bf70c38ee1eb4be03bab830bbc3a6f0bd1f1"
            },
            {
              "fixed": "8d9d9bf3565271ca7ab9c716a94e87296177e7ba"
            },
            {
              "fixed": "cc024a3de265ef6c58957f4990eccb9f806208cb"
            },
            {
              "fixed": "46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.20.0"
            },
            {
              "fixed": "7.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31622.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: digital: Bounds check NFC-A cascade depth in SDD response handler\n\nThe NFC-A anti-collision cascade in digital_in_recv_sdd_res() appends 3\nor 4 bytes to target-\u003enfcid1 on each round, but the number of cascade\nrounds is controlled entirely by the peer device.  The peer sets the\ncascade tag in the SDD_RES (deciding 3 vs 4 bytes) and the\ncascade-incomplete bit in the SEL_RES (deciding whether another round\nfollows).\n\nISO 14443-3 limits NFC-A to three cascade levels and target-\u003enfcid1 is\nsized accordingly (NFC_NFCID1_MAXSIZE = 10), but nothing in the driver\nactually enforces this.  This means a malicious peer can keep the\ncascade running, writing past the heap-allocated nfc_target with each\nround.\n\nFix this by rejecting the response when the accumulated UID would exceed\nthe buffer.\n\nCommit e329e71013c9 (\"NFC: nci: Bounds check struct nfc_target arrays\")\nfixed similar missing checks against the same field on the NCI path.",
  "id": "CVE-2026-31622",
  "modified": "2026-07-15T01:49:11.075890725Z",
  "published": "2026-04-24T14:42:39.916Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bec5698b55aa2be5c3b983dba657c01d0fd3dbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20663102c14566e900e1d2f679e30b7f1694f387"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2819f34e08bdffb6f06a51c67948ec5737fb166a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a59bf70c38ee1eb4be03bab830bbc3a6f0bd1f1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d9d9bf3565271ca7ab9c716a94e87296177e7ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ba6bb09e00b922d902f684f575779e5433fe6e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc024a3de265ef6c58957f4990eccb9f806208cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f83b399aa05a0712e3b1569a30d3d90b3533d2ef"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31622.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31622"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "NFC: digital: Bounds check NFC-A cascade depth in SDD response handler"
}