wifi: mt76: mt7996: clear stale link state on full reset

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Summary

CVECVE-2026-90355
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:34 UTC
Updated2026-09-17 17:17:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: clear stale link state on full reset After a full chip reset, mac80211 reconfig replays interface, link and channel context setup. mt7996_vif_link_add() short-circuits when the link_id is still marked in mvif->valid_links, a state introduced for postponing link teardown to interface removal. The reset path frees the link structures without clearing those bits, so the replayed setup never re-creates dev_info/bss_info/STA records in the restarted firmware and never re-registers the link wcid, leaving the device inoperative. The reset path also leaks every allocated MLD index: per-link indices and the per-vif group/remap indices are re-allocated from scratch during reconfig, but the old bits stay set in the masks, so repeated full resets exhaust the index space. Clear valid_links in the reset vif iterator and reset the MLD index masks alongside the existing omac_mask clearing.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ace5d3b6b49e8391beb4d7244348ba7da5298878 fc3762724a36867c1749233c43368c2637ecf029 git Not specified
CNA Linux Linux affected ace5d3b6b49e8391beb4d7244348ba7da5298878 75d2a4e2129b58bb0ddb842387299038495aad2a git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fc3762724a36867c1749233c43368c2637ecf029 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75d2a4e2129b58bb0ddb842387299038495aad2a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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