{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-39999",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.151Z",
        "datePublished": "2025-10-15T07:58:23.038Z",
        "dateUpdated": "2026-05-23T16:01:13.466Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:01:13.466Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix blk_mq_tags double free while nr_requests grown\n\nIn the case user trigger tags grow by queue sysfs attribute nr_requests,\nhctx->sched_tags will be freed directly and replaced with a new\nallocated tags, see blk_mq_tag_update_depth().\n\nThe problem is that hctx->sched_tags is from elevator->et->tags, while\net->tags is still the freed tags, hence later elevator exit will try to\nfree the tags again, causing kernel panic.\n\nFix this problem by replacing et->tags with new allocated tags as well.\n\nNoted there are still some long term problems that will require some\nrefactor to be fixed thoroughly[1].\n\n[1] https://lore.kernel.org/all/20250815080216.410665-1-yukuai1@huaweicloud.com/"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-mq-tag.c"
                    ],
                    "versions": [
                        {
                            "version": "58567d8e95c096ad234963df90a2ca518901f4b6",
                            "lessThan": "8faee580d63bc2a54a59dcdb7f9ce4de29384fec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f5a6604f7a4405450e4a1f54e5430f47290c500f",
                            "lessThan": "392b1d64911f4de8887fe8b68299fa8bd6e5b923",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f5a6604f7a4405450e4a1f54e5430f47290c500f",
                            "lessThan": "ba28afbd9eff2a6370f23ef4e6a036ab0cfda409",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.16.4",
                            "lessThan": "6.16.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-mq-tag.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.11",
                            "lessThanOrEqual": "6.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.1",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "6.16.4",
                                    "versionEndExcluding": "6.16.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "6.17.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8faee580d63bc2a54a59dcdb7f9ce4de29384fec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/392b1d64911f4de8887fe8b68299fa8bd6e5b923"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ba28afbd9eff2a6370f23ef4e6a036ab0cfda409"
                }
            ],
            "title": "blk-mq: fix blk_mq_tags double free while nr_requests grown",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}