{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23032",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.942Z",
        "datePublished": "2026-01-31T11:42:11.640Z",
        "dateUpdated": "2026-06-02T13:00:53.339Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:58:41.157Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix kmemleak by releasing references to fault configfs items\n\nWhen CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk\ndriver sets up fault injection support by creating the timeout_inject,\nrequeue_inject, and init_hctx_fault_inject configfs items as children\nof the top-level nullbX configfs group.\n\nHowever, when the nullbX device is removed, the references taken to\nthese fault-config configfs items are not released. As a result,\nkmemleak reports a memory leak, for example:\n\nunreferenced object 0xc00000021ff25c40 (size 32):\n  comm \"mkdir\", pid 10665, jiffies 4322121578\n  hex dump (first 32 bytes):\n    69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f  init_hctx_fault_\n    69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00  inject..........\n  backtrace (crc 1a018c86):\n    __kmalloc_node_track_caller_noprof+0x494/0xbd8\n    kvasprintf+0x74/0xf4\n    config_item_set_name+0xf0/0x104\n    config_group_init_type_name+0x48/0xfc\n    fault_config_init+0x48/0xf0\n    0xc0080000180559e4\n    configfs_mkdir+0x304/0x814\n    vfs_mkdir+0x49c/0x604\n    do_mkdirat+0x314/0x3d0\n    sys_mkdir+0xa0/0xd8\n    system_call_exception+0x1b0/0x4f0\n    system_call_vectored_common+0x15c/0x2ec\n\nFix this by explicitly releasing the references to the fault-config\nconfigfs items when dropping the reference to the top-level nullbX\nconfigfs group."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/block/null_blk/main.c"
                    ],
                    "versions": [
                        {
                            "version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
                            "lessThan": "1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
                            "lessThan": "d59ba448ccd595d5d65e197216cf781a87db2b28",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
                            "lessThan": "f1718da051282698aa8fa150bebb9724f6389fda",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
                            "lessThan": "40b94ec7edbbb867c4e26a1a43d2b898f04b93c5",
                            "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/block/null_blk/main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.122",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.67",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.7",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "6.4",
                                    "versionEndExcluding": "6.6.122"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.12.67"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.18.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda"
                },
                {
                    "url": "https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5"
                }
            ],
            "title": "null_blk: fix kmemleak by releasing references to fault configfs items",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "x_adpType": "supplier",
                "providerMetadata": {
                    "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
                    "shortName": "siemens-SADP",
                    "dateUpdated": "2026-06-02T13:00:53.339Z"
                },
                "affected": [
                    {
                        "vendor": "Siemens",
                        "product": "RUGGEDCOM RST2428P",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "V4.0",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "references": [
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"
                    }
                ]
            }
        ]
    }
}