{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72047",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.902Z",
        "datePublished": "2026-08-15T05:52:05.510Z",
        "dateUpdated": "2026-08-15T05:52:05.510Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-15T05:52:05.510Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ieee802154/ca8210.c"
                    ],
                    "versions": [
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "2c1664ccfae653979b38788211240b5a1ee317ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "093aacb0c56d5c693e3169a0224062e77c3fd0c0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "87dab14a4f68895d6f4d798e6ee3556cd64e8c72",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "65dc342274a01616f5c17105f7360a3b4bfd7a3d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "2059c28bd725beded01277cdf1f67be33e714323",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "d8ce67fa6a5e6929f5414e933ff9665176c2bce6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
                            "lessThan": "6d7f7bcf225b2d566176bf6229dbd1252940cb3c",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ieee802154/ca8210.c"
                    ],
                    "versions": [
                        {
                            "version": "4.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.261",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2-rc1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "5.15.212"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "6.1.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.12",
                                    "versionEndExcluding": "7.2-rc1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c"
                }
            ],
            "title": "ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}