{"dataType": "CVE_RECORD", "dataVersion": "5.1", "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": "2025-05-04T08:44:58.736Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:44:58.736Z"}, "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1ad197097343568066a8ffaa27ee7d0ae6d9f476", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "15c83fa0fd659dd9fbdc940a560b61236e876a80", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8b6534c9ae9dba5489703a19d8ba6c8f2cfa33c2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5fa30be7ba81191b0a0c7239a89befc0c94286d5", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "28275a7c84d21c55ab3282d897f284d8d527173c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "16670534c7cff1acd918a6a5ec751b14e7436b76", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "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": "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.9.334"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.14.300"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.19.267"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.225"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.156"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2022-49769", "lastModified": "2025-05-02T13:53:20.943", "metrics": {}, "published": "2025-05-01T15:15:59.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15c83fa0fd659dd9fbdc940a560b61236e876a80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/16670534c7cff1acd918a6a5ec751b14e7436b76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1ad197097343568066a8ffaa27ee7d0ae6d9f476"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28275a7c84d21c55ab3282d897f284d8d527173c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5fa30be7ba81191b0a0c7239a89befc0c94286d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/670f8ce56dd0632dc29a0322e188cc73ce3c6b92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b6534c9ae9dba5489703a19d8ba6c8f2cfa33c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: gfs2: Check sb_bsize_shift after reading superblock", "id": "2363438", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363438"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ngfs2: Check sb_bsize_shift after reading superblock\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.\nTested with:\nmkfs.gfs2 -O -p lock_nolock /dev/vdb\nfor i in 0 -1 64 65 32 33; do\ngfs2_edit -p sb field sb_bsize_shift $i /dev/vdb\nmount /dev/vdb /mnt/test && umount /mnt/test\ndone\nBefore this patch we get a withdraw after\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\nand with UBSAN configured we also get complaints like\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'\nAfter the patch, these complaints don't appear, mount fails immediately\nand we get an explanation in dmesg."], "name": "CVE-2022-49769", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49769\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49769\nhttps://lore.kernel.org/linux-cve-announce/2025050115-CVE-2022-49769-d028@gregkh/T"], "statement": "This patch addresses an issue in GFS2 where the sb_bsize_shift field in the superblock was not validated before use. A corrupted or maliciously modified value could cause shift-out-of-bounds errors, leading to a kernel panic or undefined behavior during mount operations. By validating sb_bsize_shift, the kernel can fail gracefully with an error message instead of crashing.", "threat_severity": "Low"}