{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ded845a781a578dfb0b5b2c138e5a067aa3b1242"
            },
            {
              "fixed": "2c1664ccfae653979b38788211240b5a1ee317ed"
            },
            {
              "fixed": "093aacb0c56d5c693e3169a0224062e77c3fd0c0"
            },
            {
              "fixed": "87dab14a4f68895d6f4d798e6ee3556cd64e8c72"
            },
            {
              "fixed": "1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe"
            },
            {
              "fixed": "65dc342274a01616f5c17105f7360a3b4bfd7a3d"
            },
            {
              "fixed": "2059c28bd725beded01277cdf1f67be33e714323"
            },
            {
              "fixed": "d8ce67fa6a5e6929f5414e933ff9665176c2bce6"
            },
            {
              "fixed": "6d7f7bcf225b2d566176bf6229dbd1252940cb3c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.12.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72047.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix pointer truncation in kfifo on 64-bit\n\nca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange\na kmalloc'd buffer pointer through a struct kfifo, but pass a literal\n'4' as the byte count to kfifo_in()/kfifo_out().\n\nThis is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the\nlow 4 bytes of the 8-byte pointer are written into the FIFO. The reader\nthen reads back 4 bytes into an 8-byte local pointer variable, leaving\nthe upper 4 bytes uninitialized stack data. The first dereference of\nthe reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel\naddress and generally results in an oops.\n\nUse sizeof(fifo_buffer) so the byte count matches pointer width on every\narchitecture.\n\nThe driver has no architecture restriction in Kconfig, so any 64-bit\nbuild with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has\nbeen latent since the driver was added in 2017 because it is most\ncommonly deployed on 32-bit MCUs.\n\nFound via a custom Coccinelle semantic patch hunting for short-byte\nkfifo I/O on byte-mode kfifos used to shuttle pointers.",
  "id": "CVE-2026-72047",
  "modified": "2026-08-18T03:31:24.221524944Z",
  "published": "2026-08-15T05:52:05.510Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72047.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72047"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit"
}