{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23234",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.988Z",
        "datePublished": "2026-03-04T14:36:38.843Z",
        "dateUpdated": "2026-05-11T22:02:55.136Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:02:55.136Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid UAF in f2fs_write_end_io()\n\nAs syzbot reported an use-after-free issue in f2fs_write_end_io().\n\nIt is caused by below race condition:\n\nloop device\t\t\t\tumount\n- worker_thread\n - loop_process_work\n  - do_req_filebacked\n   - lo_rw_aio\n    - lo_rw_aio_complete\n     - blk_mq_end_request\n      - blk_update_request\n       - f2fs_write_end_io\n        - dec_page_count\n        - folio_end_writeback\n\t\t\t\t\t- kill_f2fs_super\n\t\t\t\t\t - kill_block_super\n\t\t\t\t\t  - f2fs_put_super\n\t\t\t\t\t : free(sbi)\n       : get_pages(, F2FS_WB_CP_DATA)\n         accessed sbi which is freed\n\nIn kill_f2fs_super(), we will drop all page caches of f2fs inodes before\ncall free(sbi), it guarantee that all folios should end its writeback, so\nit should be safe to access sbi before last folio_end_writeback().\n\nLet's relocate ckpt thread wakeup flow before folio_end_writeback() to\nresolve this issue."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/data.c"
                    ],
                    "versions": [
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "0fb58aff0dafd6837cc91f4154f3ed6e020358fa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "505e1c0530db6152cab3feef8e3e4da3d3e358c9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "acc2c97fc0005846e5cf11b5ba3189fef130c9b3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "995030be4ce6338c6ff814583c14166446a64008",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "a42f99be8a16b32a0bb91bb6dda212a6ad61be5d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
                            "lessThan": "ce2739e482bce8d2c014d76c4531c877f382aa54",
                            "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/f2fs/data.c"
                    ],
                    "versions": [
                        {
                            "version": "3.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.251",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.201",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.164",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.127",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.74",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.13",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.3",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "3.13",
                                    "versionEndExcluding": "5.10.251"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "5.15.201"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.1.164"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.6.127"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.12.74"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.18.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.19.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/0fb58aff0dafd6837cc91f4154f3ed6e020358fa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/505e1c0530db6152cab3feef8e3e4da3d3e358c9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/acc2c97fc0005846e5cf11b5ba3189fef130c9b3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42"
                },
                {
                    "url": "https://git.kernel.org/stable/c/995030be4ce6338c6ff814583c14166446a64008"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a42f99be8a16b32a0bb91bb6dda212a6ad61be5d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ce2739e482bce8d2c014d76c4531c877f382aa54"
                }
            ],
            "title": "f2fs: fix to avoid UAF in f2fs_write_end_io()",
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                "engine": "bippy-1.2.0"
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    }
}