Not yet scoredPublished Oct 6, 2026

CVE-2026-98217IB/mlx4: Fix use-after-free on pkey sysfs registration failure

Updated under an hour ago (Oct 27, 2026, 6:50 AM ET)

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Exploited in the last 30 days

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 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

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

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.