{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53130", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.386Z", "datePublished": "2026-06-24T16:30:57.227Z", "dateUpdated": "2026-06-24T16:30:57.227Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:30:57.227Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/omfs: reject s_sys_blocksize smaller than OMFS_DIR_START\n\nomfs_fill_super() rejects oversized s_sys_blocksize values (> PAGE_SIZE),\nbut it does not reject values smaller than OMFS_DIR_START (0x1b8 = 440).\n\nLater, omfs_make_empty() uses\n\n sbi->s_sys_blocksize - OMFS_DIR_START\n\nas the length argument to memset(). Since s_sys_blocksize is u32,\na crafted filesystem image with s_sys_blocksize < OMFS_DIR_START causes\nan unsigned underflow there, wrapping to a value near 2^32. That drives\na ~4 GiB memset() from bh->b_data + OMFS_DIR_START and overwrites kernel\nmemory far beyond the backing block buffer.\n\nAdd the corresponding lower-bound check alongside the existing upper-bound\ncheck in omfs_fill_super(), so that malformed images are rejected during\nsuperblock validation before any filesystem data is processed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/omfs/inode.c"], "versions": [{"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "fbc72f5c645155dc2ed3573243ed20f9913e3a54", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "5822a05a841a10794ad818620dd2af490b0705d3", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "754ff1bea3819a90c6f33cccfc1a299ef7609f07", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "131ea3e57fc22936ed0e2c8330f2e36106172f51", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "79f84af38c9fef9deb0e02c79eb969b5541c2644", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "6561afc38398e3518a29c5eebb975c30468f98a6", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "817f16ed62bc58a168417bfb5e859c2a370bab03", "status": "affected", "versionType": "git"}, {"version": "a3ab7155ea21aadc8a4d5687e91b3d876973185e", "lessThan": "0621c385fda1376e967f37ccd534c26c3e511d14", "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/omfs/inode.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "2.6.27", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fbc72f5c645155dc2ed3573243ed20f9913e3a54"}, {"url": "https://git.kernel.org/stable/c/5822a05a841a10794ad818620dd2af490b0705d3"}, {"url": "https://git.kernel.org/stable/c/754ff1bea3819a90c6f33cccfc1a299ef7609f07"}, {"url": "https://git.kernel.org/stable/c/131ea3e57fc22936ed0e2c8330f2e36106172f51"}, {"url": "https://git.kernel.org/stable/c/79f84af38c9fef9deb0e02c79eb969b5541c2644"}, {"url": "https://git.kernel.org/stable/c/6561afc38398e3518a29c5eebb975c30468f98a6"}, {"url": "https://git.kernel.org/stable/c/817f16ed62bc58a168417bfb5e859c2a370bab03"}, {"url": "https://git.kernel.org/stable/c/0621c385fda1376e967f37ccd534c26c3e511d14"}], "title": "fs/omfs: reject s_sys_blocksize smaller than OMFS_DIR_START", "x_generator": {"engine": "bippy-1.2.0"}}}}

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