{
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    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47254",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix use-after-free in gfs2_glock_shrink_scan\n\nThe GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to\nremove the glock from the lru list in __gfs2_glock_put().\n\nOn the shrink scan path, the same flag is cleared under lru_lock but because\nof cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the\nput side can be made without deleting the glock from the lru list.\n\nKeep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to\nensure correct behavior on both sides - clear GLF_LRU after list_del under\nlru_lock."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "1da177e4c3f4",
                                            "version_value": "38ce32953450"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.4.274",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.9.274",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.14.238",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.19.196",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.4.127",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.45",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.12.12",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
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    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4"
            },
            {
                "url": "https://git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458a"
            },
            {
                "url": "https://git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595"
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            {
                "url": "https://git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4"
            },
            {
                "url": "https://git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d",
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                "name": "https://git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d"
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                "name": "https://git.kernel.org/stable/c/a61156314b66456ab6a291ed5deba1ebd002ab3c"
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e87ef30fe73e7e10d2c85bdcc778dcec24dca553"
            },
            {
                "url": "https://git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2"
            }
        ]
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    "generator": {
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