{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53319",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.398Z",
        "datePublished": "2026-06-26T19:41:11.269Z",
        "dateUpdated": "2026-06-26T19:41:11.269Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-26T19:41:11.269Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()\n\nwbt_init_enable_default() uses WARN_ON_ONCE to check for failures from\nwbt_alloc() and wbt_init(). However, both are expected failure paths:\n\n- wbt_alloc() can return NULL under memory pressure (-ENOMEM)\n- wbt_init() can fail with -EBUSY if wbt is already registered\n\nsyzbot triggers this by injecting memory allocation failures during MTD\npartition creation via ioctl(BLKPG), causing a spurious warning.\n\nwbt_init_enable_default() is a best-effort initialization called from\nblk_register_queue() with a void return type. Failure simply means the\ndisk operates without writeback throttling, which is harmless.\n\nReplace WARN_ON_ONCE with plain if-checks, consistent with how\nwbt_set_lat() in the same file already handles these failures. Add a\npr_warn() for the wbt_init() failure to retain diagnostic information\nwithout triggering a full stack trace."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-wbt.c"
                    ],
                    "versions": [
                        {
                            "version": "41afaeeda5099d9cd07eaa7dc6c3d20c6f1dd9e9",
                            "lessThan": "fd7a982657077469802594a5165bc30b9a55af70",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "41afaeeda5099d9cd07eaa7dc6c3d20c6f1dd9e9",
                            "lessThan": "e9b004ff83067cdf96774b45aea4b239ace99a2f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-wbt.c"
                    ],
                    "versions": [
                        {
                            "version": "7.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "7.0",
                                    "versionEndExcluding": "7.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.0",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/fd7a982657077469802594a5165bc30b9a55af70"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e9b004ff83067cdf96774b45aea4b239ace99a2f"
                }
            ],
            "title": "blk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}