{"id":"CVE-2026-72160","summary":"ocfs2: reject dinodes with non-canonical i_mode type","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject dinodes with non-canonical i_mode type\n\nPatch series \"ocfs2: harden inode validators against forged metadata\", v2.\n\nThis series adds three structural checks to OCFS2 dinode validation so\nmalformed on-disk fields are rejected before ocfs2_populate_inode() copies\nthem into the in-core inode.\n\nThe checks cover:\n\n  - i_mode values whose type bits do not name a canonical POSIX file\n    type;\n  - non-device dinodes whose id1.dev1.i_rdev field is non-zero; and\n  - non-inline dinodes that claim non-zero i_size while i_clusters is\n    zero, covering directories unconditionally and regular files on\n    non-sparse volumes.\n\nThe normal read path reports these through ocfs2_error(), matching the\nexisting suballoc-slot, inline-data, chain-list, and refcount checks.  The\nonline filecheck path uses the same structural predicates but keeps its\nown reporting contract, returning OCFS2_FILECHECK_ERR_INVALIDINO instead\nof calling ocfs2_error().\n\n\nThis patch (of 3):\n\nocfs2_validate_inode_block() currently accepts any non-zero i_mode value. \nocfs2_populate_inode() then copies that mode verbatim into inode-\u003ei_mode\nand dispatches on i_mode & S_IFMT to the file/dir/symlink/special_file\niops; an unrecognised type falls through to ocfs2_special_file_iops and\ninit_special_inode().\n\nReject dinodes whose type bits do not name one of the seven canonical\nPOSIX file types.  Use fs_umode_to_ftype(), the same generic file-type\nconversion helper OCFS2 already uses for directory entries, so the\naccepted inode type set matches the kernel file-type vocabulary instead of\nopen-coding a local switch.\n\nApply the same structural check to the online filecheck read path. \nfilecheck keeps its own error namespace, so it reports malformed i_mode\nthrough the filecheck logger and OCFS2_FILECHECK_ERR_INVALIDINO instead of\ncalling ocfs2_error(), but it must not allow a malformed dinode to proceed\ninto ocfs2_populate_inode().","modified":"2026-08-18T03:56:37.786642643Z","published":"2026-08-15T05:53:28.943Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72160.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/157d31ef45038d89cd19620105e082d43c8e41e0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2e3aac33988ef4e4170141db8e995693ea38357c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4db3b6a2a8ecf2a89d26a4090ace4072c6fad050"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5366a017099c6a3c443be908a05f26fd72af12a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/82afe13558354390d8a592a5334d5f4fd72c0e5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5b555bcabbb0aff8745ad181768eaf9d964c1ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b858f2d57cfc9d57ce61b86051d603dc0ebccd40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72160.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72160"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b657c95c11088d77fc1bfc9c84d940f778bf9d12"},{"fixed":"2e3aac33988ef4e4170141db8e995693ea38357c"},{"fixed":"fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f"},{"fixed":"157d31ef45038d89cd19620105e082d43c8e41e0"},{"fixed":"a5b555bcabbb0aff8745ad181768eaf9d964c1ee"},{"fixed":"82afe13558354390d8a592a5334d5f4fd72c0e5c"},{"fixed":"4db3b6a2a8ecf2a89d26a4090ace4072c6fad050"},{"fixed":"b858f2d57cfc9d57ce61b86051d603dc0ebccd40"},{"fixed":"5366a017099c6a3c443be908a05f26fd72af12a1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72160.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.29"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72160.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}