CVE-2026-93073dax: read holder_ops once in dax_holder_notify_failure()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: dax: read holder_ops once in dax_holder_notify_failure() dax_holder_notify_failure() reads dax_dev->holder_ops twice without READ_ONCE() -- once for the NULL check and once for the indirect notify_failure() call. A concurrent fs_put_dax() can clear holder_ops between the two reads, so the check can observe a non-NULL pointer while the call dereferences NULL. (kill_dax() also clears holder_ops, but only after synchronize_srcu(), so it cannot race a reader that is inside dax_read_lock(); fs_put_dax() does no such synchronization.) Fetch holder_ops once into a local with READ_ONCE() so the NULL check and the indirect call observe the same value.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8012b866085523758780850087102421dbcce522 builds before 1661b9bf78def01a8c96409569772d9b2592f4ba; 8012b866085523758780850087102421dbcce522 builds before 0a42180d5410c98829ee72d1d426fb7faf9e6873; from 8012b866085523758780850087102421dbcce522 before ee1251621d1c7cf3155c6704542cbb358d799968; 8012b866085523758780850087102421dbcce522 builds before 6a37acecc7c29136235cbc446a1b89e81414344b; from 8012b866085523758780850087102421dbcce522 before eb412f80311fc7ab6eb3203091a3fe59a5e9fd30; 8012b866085523758780850087102421dbcce522 builds before 7ae9d15bdcde0f2955ae13b6a95587f9e23b2359 | CNA record |
References
- https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba
- https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873
- https://git.kernel.org/stable/c/ee1251621d1c7cf3155c6704542cbb358d799968
- https://git.kernel.org/stable/c/6a37acecc7c29136235cbc446a1b89e81414344b
- https://git.kernel.org/stable/c/eb412f80311fc7ab6eb3203091a3fe59a5e9fd30
- https://git.kernel.org/stable/c/7ae9d15bdcde0f2955ae13b6a95587f9e23b2359
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.