CVE-2026-72159None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: ocfs2: reject non-inline dinodes with i_size and zero i_clusters On a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a non-inline regular file with non-ze…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: reject non-inline dinodes with i_size and zero i_clusters
On a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a non-inline regular file with non-zero i_size and zero i_clusters is structurally malformed: the extent map declares no allocated clusters yet the size header claims content exists. Keep rejecting that shape, but express it through a shared predicate so the same invariant is available to normal inode reads and online filecheck.
The same zero-cluster shape is also malformed for non-inline directories. ocfs2 directory growth allocates backing storage before advancing i_size, and ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches i_size_read(inode). A forged directory dinode with a huge i_size and no clusters would repeatedly fail on holes while advancing through the claimed size.
Sparse regular files remain exempt: on sparse-alloc volumes, truncate can legitimately grow i_size without allocating clusters. System inodes and inline-data dinodes also retain their separate storage rules.
Mirror the check in ocfs2_filecheck_validate_inode_block() as well. filecheck reports through its own error namespace, so malformed size/cluster state is logged as a filecheck invalid-inode result rather than via ocfs2_error(), but it must not proceed into ocfs2_populate_inode().
Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 416d3e5f8a30ed04fe21ba7dc73c2841c3b56265Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < ed0f938f946f16b772e99cb8c277ab57828e5be4Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 83f6756a7b71adec0a41ae68e079a38906d59c6cLinux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 38c1ef7ce50eb4af0f89038b8aba12396ddb9233Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < d837068eefbc2651fe5789bf75a0f945710f7b8eLinux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 2174c68f623b74bd8690a4a6a4a52882d8ac3dc3Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 3bfeb436d4be6a2beb56cab344770e93e6b07260Linux >= b657c95c11088d77fc1bfc9c84d940f778bf9d12 < 7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4Linux 2.6.29Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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