CVE-2026-98217

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < 791471421d848ce13e84f4b21c9e19973d471c4eaffected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < 734f066933484f6c7cedea0312763249beed5845affected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < a07bee32127d7c4cd3b1bb9a088e21d0c93634c9affected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < cf20d7476754c00eec04ae23d3e929de33ce0345affected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < 0c3482e965b18bc242e54e899d1c4d391ca8e5e3affected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < ffb80872617b5f9b3dd1536ec2909029fa66f228affected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < ced1186fea7c77e16681c7ef4802897885989c3baffected
LinuxLinuxc1e7e466120b80ce49e91af0c9da1ce6dee4844a < 1af874e9f4ce22ccf8b10ab5462f32c70d3be21aaffected
LinuxLinux3.7affected
LinuxLinux0 < 3.7unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References