CVE-2026-90356

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset

mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu while dev->wcid[] still holds pointers to the wcid embedded in each freed link; mt76_reset_device() then dereferences those entries and runs mt76_wcid_cleanup() on them. If a grace period elapses in between, the cleanup operates on freed memory.

Run mt76_reset_device() first, so the wcid entries are cleaned up and cleared while the links are still valid.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxace5d3b6b49e8391beb4d7244348ba7da5298878 < 2b10eb3636d0c4cb6b763e045ec1294dbd70f5adaffected
LinuxLinuxace5d3b6b49e8391beb4d7244348ba7da5298878 < 8826d7a5e2dd727aa96456ccd58b33d2b080e935affected
LinuxLinuxace5d3b6b49e8391beb4d7244348ba7da5298878 < 7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References