{"id":"CVE-2026-72159","state":"PUBLISHED","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().","publishedAt":"2026-08-15T05:53:28.205Z","updatedAt":"2026-08-17T05:09:19.690Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"ed0f938f946f16b772e99cb8c277ab57828e5be4","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"83f6756a7b71adec0a41ae68e079a38906d59c6c","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"38c1ef7ce50eb4af0f89038b8aba12396ddb9233","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"d837068eefbc2651fe5789bf75a0f945710f7b8e","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"3bfeb436d4be6a2beb56cab344770e93e6b07260","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/inode.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/inode.c"]}],"references":["https://git.kernel.org/stable/c/416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","https://git.kernel.org/stable/c/ed0f938f946f16b772e99cb8c277ab57828e5be4","https://git.kernel.org/stable/c/83f6756a7b71adec0a41ae68e079a38906d59c6c","https://git.kernel.org/stable/c/38c1ef7ce50eb4af0f89038b8aba12396ddb9233","https://git.kernel.org/stable/c/d837068eefbc2651fe5789bf75a0f945710f7b8e","https://git.kernel.org/stable/c/2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","https://git.kernel.org/stable/c/3bfeb436d4be6a2beb56cab344770e93e6b07260","https://git.kernel.org/stable/c/7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72159.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72159","state":"PUBLISHED","datePublished":"2026-08-15T05:53:28.205Z","dateUpdated":"2026-08-17T05:09:19.690Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.909Z"},"containers":{"cna":{"title":"ocfs2: reject non-inline dinodes with i_size and zero i_clusters","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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"416d3e5f8a30ed04fe21ba7dc73c2841c3b56265","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"ed0f938f946f16b772e99cb8c277ab57828e5be4","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"83f6756a7b71adec0a41ae68e079a38906d59c6c","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"38c1ef7ce50eb4af0f89038b8aba12396ddb9233","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"d837068eefbc2651fe5789bf75a0f945710f7b8e","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"2174c68f623b74bd8690a4a6a4a52882d8ac3dc3","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"3bfeb436d4be6a2beb56cab344770e93e6b07260","versionType":"git"},{"version":"b657c95c11088d77fc1bfc9c84d940f778bf9d12","status":"affected","lessThan":"7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/inode.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/inode.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:09:19.690Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}