{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68771",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T10:30:51.035Z",
        "datePublished": "2026-01-13T15:28:49.272Z",
        "dateUpdated": "2026-05-11T21:53:02.168Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:53:02.168Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix kernel BUG in ocfs2_find_victim_chain\n\nsyzbot reported a kernel BUG in ocfs2_find_victim_chain() because the\n`cl_next_free_rec` field of the allocation chain list (next free slot in\nthe chain list) is 0, triggring the BUG_ON(!cl->cl_next_free_rec)\ncondition in ocfs2_find_victim_chain() and panicking the kernel.\n\nTo fix this, an if condition is introduced in ocfs2_claim_suballoc_bits(),\njust before calling ocfs2_find_victim_chain(), the code block in it being\nexecuted when either of the following conditions is true:\n\n1. `cl_next_free_rec` is equal to 0, indicating that there are no free\nchains in the allocation chain list\n2. `cl_next_free_rec` is greater than `cl_count` (the total number of\nchains in the allocation chain list)\n\nEither of them being true is indicative of the fact that there are no\nchains left for usage.\n\nThis is addressed using ocfs2_error(), which prints\nthe error log for debugging purposes, rather than panicking the kernel."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ocfs2/suballoc.c"
                    ],
                    "versions": [
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "d0fd1f732ea8063cecd07a3879b7d815c7ee71ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "b08a33d5f80efe6979a6e8f905c1a898910c21dd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "96f1b074c98c20f55a3b23d2ab44d9fb0f619869",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "e24aedae71652d4119049f1fbef6532ccbe3966d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "7acc0390e0dd7474c4451d05465a677d55ad4268",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
                            "lessThan": "039bef30e320827bac8990c9f29d2a68cd8adb5f",
                            "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/ocfs2/suballoc.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.248",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.198",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.160",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.120",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.64",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.3",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "2.6.16",
                                    "versionEndExcluding": "5.10.248"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "5.15.198"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "6.1.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "6.6.120"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "6.12.64"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "6.18.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.16",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d0fd1f732ea8063cecd07a3879b7d815c7ee71ed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b08a33d5f80efe6979a6e8f905c1a898910c21dd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/96f1b074c98c20f55a3b23d2ab44d9fb0f619869"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e24aedae71652d4119049f1fbef6532ccbe3966d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7acc0390e0dd7474c4451d05465a677d55ad4268"
                },
                {
                    "url": "https://git.kernel.org/stable/c/039bef30e320827bac8990c9f29d2a68cd8adb5f"
                }
            ],
            "title": "ocfs2: fix kernel BUG in ocfs2_find_victim_chain",
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    }
}