{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53149",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-05-02T15:51:43.565Z",
        "datePublished": "2025-09-15T14:03:13.334Z",
        "dateUpdated": "2026-05-11T19:39:23.629Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:39:23.629Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid deadlock in fs reclaim with page writeback\n\nExt4 has a filesystem wide lock protecting ext4_writepages() calls to\navoid races with switching of journalled data flag or inode format. This\nlock can however cause a deadlock like:\n\nCPU0                            CPU1\n\next4_writepages()\n  percpu_down_read(sbi->s_writepages_rwsem);\n                                ext4_change_inode_journal_flag()\n                                  percpu_down_write(sbi->s_writepages_rwsem);\n                                    - blocks, all readers block from now on\n  ext4_do_writepages()\n    ext4_init_io_end()\n      kmem_cache_zalloc(io_end_cachep, GFP_KERNEL)\n        fs_reclaim frees dentry...\n          dentry_unlink_inode()\n            iput() - last ref =>\n              iput_final() - inode dirty =>\n                write_inode_now()...\n                  ext4_writepages() tries to acquire sbi->s_writepages_rwsem\n                    and blocks forever\n\nMake sure we cannot recurse into filesystem reclaim from writeback code\nto avoid the deadlock."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/ext4.h",
                        "fs/ext4/inode.c",
                        "fs/ext4/migrate.c"
                    ],
                    "versions": [
                        {
                            "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
                            "lessThan": "2ec97dc90df40c50e509809dc9a198638a7e18b6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
                            "lessThan": "4b4340bf04ce9a52061f15000ecedd126abc093c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
                            "lessThan": "00d873c17e29cc32d90ca852b82685f1673acaa5",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/ext4.h",
                        "fs/ext4/inode.c",
                        "fs/ext4/migrate.c"
                    ],
                    "versions": [
                        {
                            "version": "4.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.16",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.3",
                            "lessThanOrEqual": "6.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4",
                            "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": "4.7",
                                    "versionEndExcluding": "6.2.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.3.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2ec97dc90df40c50e509809dc9a198638a7e18b6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4b4340bf04ce9a52061f15000ecedd126abc093c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/00d873c17e29cc32d90ca852b82685f1673acaa5"
                }
            ],
            "title": "ext4: avoid deadlock in fs reclaim with page writeback",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}