{"id":"CVE-2026-93073","summary":"dax: read holder_ops once in dax_holder_notify_failure()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndax: read holder_ops once in dax_holder_notify_failure()\n\ndax_holder_notify_failure() reads dax_dev-\u003eholder_ops twice without\nREAD_ONCE() -- once for the NULL check and once for the indirect\nnotify_failure() call. A concurrent fs_put_dax() can clear holder_ops\nbetween the two reads, so the check can observe a non-NULL pointer while\nthe call dereferences NULL. (kill_dax() also clears holder_ops, but only\nafter synchronize_srcu(), so it cannot race a reader that is inside\ndax_read_lock(); fs_put_dax() does no such synchronization.)\n\nFetch holder_ops once into a local with READ_ONCE() so the NULL check and\nthe indirect call observe the same value.","modified":"2026-09-19T03:47:27.901539344Z","published":"2026-09-17T16:10:56.405Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93073.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a37acecc7c29136235cbc446a1b89e81414344b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ae9d15bdcde0f2955ae13b6a95587f9e23b2359"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb412f80311fc7ab6eb3203091a3fe59a5e9fd30"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee1251621d1c7cf3155c6704542cbb358d799968"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93073.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93073"},{"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":"8012b866085523758780850087102421dbcce522"},{"fixed":"1661b9bf78def01a8c96409569772d9b2592f4ba"},{"fixed":"0a42180d5410c98829ee72d1d426fb7faf9e6873"},{"fixed":"ee1251621d1c7cf3155c6704542cbb358d799968"},{"fixed":"6a37acecc7c29136235cbc446a1b89e81414344b"},{"fixed":"eb412f80311fc7ab6eb3203091a3fe59a5e9fd30"},{"fixed":"7ae9d15bdcde0f2955ae13b6a95587f9e23b2359"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93073.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93073.json"}}],"schema_version":"1.9.0"}