CVE-2026-98217IB/mlx4: Fix use-after-free on pkey sysfs registration failure
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In the Linux kernel, the following vulnerability has been resolved: IB/mlx4: Fix use-after-free on pkey sysfs registration failure register_pkey_tree() ignores errors from register_one_pkey_tree() and continues registering the remaining slaves. The per-slave error path has already released the pkey parent kobjects, but their pointers remain stored in the device. A later device cleanup therefore passes the stale pointers to kobject_put(), causing a use-after-free. Clear the parent pointers after releasing a failed slave tree and skip unregistered trees during device cleanup. This preserves the existing best-effort registration behavior while preventing a second cleanup of the failed tree.
- 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
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before 791471421d848ce13e84f4b21c9e19973d471c4e; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before 734f066933484f6c7cedea0312763249beed5845; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before a07bee32127d7c4cd3b1bb9a088e21d0c93634c9; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before cf20d7476754c00eec04ae23d3e929de33ce0345; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before 0c3482e965b18bc242e54e899d1c4d391ca8e5e3; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before ffb80872617b5f9b3dd1536ec2909029fa66f228; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before ced1186fea7c77e16681c7ef4802897885989c3b; from c1e7e466120b80ce49e91af0c9da1ce6dee4844a before 1af874e9f4ce22ccf8b10ab5462f32c70d3be21a | CNA record |
References
- https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e
- https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845
- https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9
- https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345
- https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3
- https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228
- https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b
- https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a
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.