{"api_version":"1","generated_at":"2026-08-16T05:01:58+00:00","cve":"CVE-2026-72159","urls":{"html":"https://cve.report/CVE-2026-72159","api":"https://cve.report/api/cve/CVE-2026-72159.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72159","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72159"},"summary":{"title":"ocfs2: reject non-inline dinodes with i_size and zero i_clusters","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject non-inline dinodes with i_size and zero i_clusters\n\nOn a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a\nnon-inline regular file with non-zero i_size and zero i_clusters is\nstructurally malformed: the extent map declares no allocated clusters yet\nthe size header claims content exists.  Keep rejecting that shape, but\nexpress it through a shared predicate so the same invariant is available\nto normal inode reads and online filecheck.\n\nThe same zero-cluster shape is also malformed for non-inline directories. \nocfs2 directory growth allocates backing storage before advancing i_size,\nand ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches\ni_size_read(inode).  A forged directory dinode with a huge i_size and no\nclusters would repeatedly fail on holes while advancing through the\nclaimed size.\n\nSparse regular files remain exempt: on sparse-alloc volumes, truncate can\nlegitimately grow i_size without allocating clusters.  System inodes and\ninline-data dinodes also retain their separate storage rules.\n\nMirror the check in ocfs2_filecheck_validate_inode_block() as well. \nfilecheck reports through its own error namespace, so malformed\nsize/cluster state is logged as a filecheck invalid-inode result rather\nthan via ocfs2_error(), but it must not proceed into\nocfs2_populate_inode().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:33","updated_at":"2026-08-15 06:21:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/83f6756a7b71adec0a41ae68e079a38906d59c6c","name":"https://git.kernel.org/stable/c/83f6756a7b71adec0a41ae68e079a38906d59c6c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/38c1ef7ce50eb4af0f89038b8aba12396ddb9233","name":"https://git.kernel.org/stable/c/38c1ef7ce50eb4af0f89038b8aba12396ddb9233","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3bfeb436d4be6a2beb56cab344770e93e6b07260","name":"https://git.kernel.org/stable/c/3bfeb436d4be6a2beb56cab344770e93e6b07260","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4","name":"https://git.kernel.org/stable/c/7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ed0f938f946f16b772e99cb8c277ab57828e5be4","name":"https://git.kernel.org/stable/c/ed0f938f946f16b772e99cb8c277ab57828e5be4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","name":"https://git.kernel.org/stable/c/2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d837068eefbc2651fe5789bf75a0f945710f7b8e","name":"https://git.kernel.org/stable/c/d837068eefbc2651fe5789bf75a0f945710f7b8e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","name":"https://git.kernel.org/stable/c/416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72159","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72159","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b657c95c11088d77fc1bfc9c84d940f778bf9d12 416d3e5f8a30ed04fe21ba7dc73c2841c3b56265 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b657c95c11088d77fc1bfc9c84d940f778bf9d12 ed0f938f946f16b772e99cb8c277ab57828e5be4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b657c95c11088d77fc1bfc9c84d940f778bf9d12 83f6756a7b71adec0a41ae68e079a38906d59c6c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b657c95c11088d77fc1bfc9c84d940f778bf9d12 38c1ef7ce50eb4af0f89038b8aba12396ddb9233 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72159","cve":"CVE-2026-72159","epss":"0.002200000","percentile":"0.127450000","score_date":"2026-08-15","updated_at":"2026-08-16 00:00:32"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ocfs2/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"ed0f938f946f16b772e99cb8c277ab57828e5be4","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"83f6756a7b71adec0a41ae68e079a38906d59c6c","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"38c1ef7ce50eb4af0f89038b8aba12396ddb9233","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"d837068eefbc2651fe5789bf75a0f945710f7b8e","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"3bfeb436d4be6a2beb56cab344770e93e6b07260","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"},{"lessThan":"7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4","status":"affected","version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ocfs2/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject non-inline dinodes with i_size and zero i_clusters\n\nOn a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a\nnon-inline regular file with non-zero i_size and zero i_clusters is\nstructurally malformed: the extent map declares no allocated clusters yet\nthe size header claims content exists.  Keep rejecting that shape, but\nexpress it through a shared predicate so the same invariant is available\nto normal inode reads and online filecheck.\n\nThe same zero-cluster shape is also malformed for non-inline directories. \nocfs2 directory growth allocates backing storage before advancing i_size,\nand ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches\ni_size_read(inode).  A forged directory dinode with a huge i_size and no\nclusters would repeatedly fail on holes while advancing through the\nclaimed size.\n\nSparse regular files remain exempt: on sparse-alloc volumes, truncate can\nlegitimately grow i_size without allocating clusters.  System inodes and\ninline-data dinodes also retain their separate storage rules.\n\nMirror the check in ocfs2_filecheck_validate_inode_block() as well. \nfilecheck reports through its own error namespace, so malformed\nsize/cluster state is logged as a filecheck invalid-inode result rather\nthan via ocfs2_error(), but it must not proceed into\nocfs2_populate_inode()."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:53:28.205Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/416d3e5f8a30ed04fe21ba7dc73c2841c3b56265"},{"url":"https://git.kernel.org/stable/c/ed0f938f946f16b772e99cb8c277ab57828e5be4"},{"url":"https://git.kernel.org/stable/c/83f6756a7b71adec0a41ae68e079a38906d59c6c"},{"url":"https://git.kernel.org/stable/c/38c1ef7ce50eb4af0f89038b8aba12396ddb9233"},{"url":"https://git.kernel.org/stable/c/d837068eefbc2651fe5789bf75a0f945710f7b8e"},{"url":"https://git.kernel.org/stable/c/2174c68f623b74bd8690a4a6a4a52882d8ac3dc3"},{"url":"https://git.kernel.org/stable/c/3bfeb436d4be6a2beb56cab344770e93e6b07260"},{"url":"https://git.kernel.org/stable/c/7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4"}],"title":"ocfs2: reject non-inline dinodes with i_size and zero i_clusters","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72159","datePublished":"2026-08-15T05:53:28.205Z","dateReserved":"2026-08-09T03:40:39.909Z","dateUpdated":"2026-08-15T05:53:28.205Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:33","lastModifiedDate":"2026-08-15 06:21:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72159","Ordinal":"1","Title":"ocfs2: reject non-inline dinodes with i_size and zero i_clusters","CVE":"CVE-2026-72159","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72159","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject non-inline dinodes with i_size and zero i_clusters\n\nOn a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a\nnon-inline regular file with non-zero i_size and zero i_clusters is\nstructurally malformed: the extent map declares no allocated clusters yet\nthe size header claims content exists.  Keep rejecting that shape, but\nexpress it through a shared predicate so the same invariant is available\nto normal inode reads and online filecheck.\n\nThe same zero-cluster shape is also malformed for non-inline directories. \nocfs2 directory growth allocates backing storage before advancing i_size,\nand ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches\ni_size_read(inode).  A forged directory dinode with a huge i_size and no\nclusters would repeatedly fail on holes while advancing through the\nclaimed size.\n\nSparse regular files remain exempt: on sparse-alloc volumes, truncate can\nlegitimately grow i_size without allocating clusters.  System inodes and\ninline-data dinodes also retain their separate storage rules.\n\nMirror the check in ocfs2_filecheck_validate_inode_block() as well. \nfilecheck reports through its own error namespace, so malformed\nsize/cluster state is logged as a filecheck invalid-inode result rather\nthan via ocfs2_error(), but it must not proceed into\nocfs2_populate_inode().","Type":"Description","Title":"ocfs2: reject non-inline dinodes with i_size and zero i_clusters"}]}}}