{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49769",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:17:33.804Z",
        "datePublished": "2025-05-01T14:09:07.526Z",
        "dateUpdated": "2026-05-11T19:06:25.568Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:06:25.568Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Check sb_bsize_shift after reading superblock\n\nFuzzers like to scribble over sb_bsize_shift but in reality it's very\nunlikely that this field would be corrupted on its own. Nevertheless it\nshould be checked to avoid the possibility of messy mount errors due to\nbad calculations. It's always a fixed value based on the block size so\nwe can just check that it's the expected value.\n\nTested with:\n\n    mkfs.gfs2 -O -p lock_nolock /dev/vdb\n    for i in 0 -1 64 65 32 33; do\n        gfs2_edit -p sb field sb_bsize_shift $i /dev/vdb\n        mount /dev/vdb /mnt/test && umount /mnt/test\n    done\n\nBefore this patch we get a withdraw after\n\n[   76.413681] gfs2: fsid=loop0.0: fatal: invalid metadata block\n[   76.413681]   bh = 19 (type: exp=5, found=4)\n[   76.413681]   function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 492\n\nand with UBSAN configured we also get complaints like\n\n[   76.373395] UBSAN: shift-out-of-bounds in fs/gfs2/ops_fstype.c:295:19\n[   76.373815] shift exponent 4294967287 is too large for 64-bit type 'long unsigned int'\n\nAfter the patch, these complaints don't appear, mount fails immediately\nand we get an explanation in dmesg."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/gfs2/ops_fstype.c"
                    ],
                    "versions": [
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "1ad197097343568066a8ffaa27ee7d0ae6d9f476",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "15c83fa0fd659dd9fbdc940a560b61236e876a80",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "8b6534c9ae9dba5489703a19d8ba6c8f2cfa33c2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "5fa30be7ba81191b0a0c7239a89befc0c94286d5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "28275a7c84d21c55ab3282d897f284d8d527173c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "16670534c7cff1acd918a6a5ec751b14e7436b76",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3b94faa5fe5968827ba0640ee9fba4b3e7f736e",
                            "lessThan": "670f8ce56dd0632dc29a0322e188cc73ce3c6b92",
                            "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/gfs2/ops_fstype.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.9.334",
                            "lessThanOrEqual": "4.9.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.300",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.267",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.225",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.156",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.80",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.10",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "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": "2.6.19",
                                    "versionEndExcluding": "4.9.334"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.19",
                                    "versionEndExcluding": "4.14.300"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.19",
                                    "versionEndExcluding": "5.4.225"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.10.156"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.19",
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.19",
                                    "versionEndExcluding": "6.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.19",
                                    "versionEndExcluding": "6.1"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1ad197097343568066a8ffaa27ee7d0ae6d9f476"
                },
                {
                    "url": "https://git.kernel.org/stable/c/15c83fa0fd659dd9fbdc940a560b61236e876a80"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b6534c9ae9dba5489703a19d8ba6c8f2cfa33c2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5fa30be7ba81191b0a0c7239a89befc0c94286d5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/28275a7c84d21c55ab3282d897f284d8d527173c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/16670534c7cff1acd918a6a5ec751b14e7436b76"
                },
                {
                    "url": "https://git.kernel.org/stable/c/670f8ce56dd0632dc29a0322e188cc73ce3c6b92"
                }
            ],
            "title": "gfs2: Check sb_bsize_shift after reading superblock",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}