{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89834",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.769Z",
        "datePublished": "2026-09-16T10:31:07.093Z",
        "dateUpdated": "2026-10-21T12:48:57.837Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:48:57.837Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to migrate all curseg types during free_segment_range\n\nIn free_segment_range(), the curseg evacuation loop only iterates up to\nNR_CURSEG_PERSIST_TYPE (0..5), missing non-persistent in-memory curseg\ntypes such as CURSEG_COLD_DATA_PINNED and CURSEG_ALL_DATA_ATGC.\n\nEven though these in-memory curseg types are not saved in the on-disk\ncheckpoint header, they still occupy active physical segments at runtime.\nIf an active in-memory curseg happens to be allocated within the segment\nrange being truncated during filesystem shrink, failing to evacuate it\nwill cause subsequent writes to the curseg attempting out-of-bounds I/O\non the truncated storage range.\n\nFix this by expanding the curseg evacuation loop upper bound to\nNR_CURSEG_TYPE to ensure all active curseg types are safely migrated\nout of the target range."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/gc.c"
                    ],
                    "versions": [
                        {
                            "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
                            "lessThan": "d358d2fc6be11eefde5eb1286f1c43a6d0330db6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
                            "lessThan": "3b85edf3391f3e1f624f409a7d2d239885f567b7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
                            "lessThan": "b8ae1228c153622afa71a179c9d4dc268117e0f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
                            "lessThan": "b9776094aa7118e8e5dfdcd791ffc8330c5ca408",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
                            "lessThan": "8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1",
                            "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/gc.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.51",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.5",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "5.10",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.18.51"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.2.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d358d2fc6be11eefde5eb1286f1c43a6d0330db6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3b85edf3391f3e1f624f409a7d2d239885f567b7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b8ae1228c153622afa71a179c9d4dc268117e0f0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b9776094aa7118e8e5dfdcd791ffc8330c5ca408"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1"
                }
            ],
            "title": "f2fs: fix to migrate all curseg types during free_segment_range",
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}