CVE-2026-90356 PUBLISHED

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

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from ace5d3b6b49e8391beb4d7244348ba7da5298878 to 2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad (excl.)
  • affected from ace5d3b6b49e8391beb4d7244348ba7da5298878 to 8826d7a5e2dd727aa96456ccd58b33d2b080e935 (excl.)
  • affected from ace5d3b6b49e8391beb4d7244348ba7da5298878 to 7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.18 is affected
  • unaffected from 0 to 6.18 (excl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References