{"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":"2026-06-28T06:39:22.273Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:39:22.273Z"},"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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"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"}}}}