{"id":"CVE-2026-90355","summary":"wifi: mt76: mt7996: clear stale link state on full reset","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: clear stale link state on full reset\n\nAfter a full chip reset, mac80211 reconfig replays interface, link and\nchannel context setup. mt7996_vif_link_add() short-circuits when the\nlink_id is still marked in mvif-\u003evalid_links, a state introduced for\npostponing link teardown to interface removal. The reset path frees the\nlink structures without clearing those bits, so the replayed setup never\nre-creates dev_info/bss_info/STA records in the restarted firmware and\nnever re-registers the link wcid, leaving the device inoperative.\n\nThe reset path also leaks every allocated MLD index: per-link indices\nand the per-vif group/remap indices are re-allocated from scratch during\nreconfig, but the old bits stay set in the masks, so repeated full\nresets exhaust the index space.\n\nClear valid_links in the reset vif iterator and reset the MLD index\nmasks alongside the existing omac_mask clearing.","modified":"2026-09-19T03:47:26.007969085Z","published":"2026-09-17T16:09:01.543Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90355.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/75d2a4e2129b58bb0ddb842387299038495aad2a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc3762724a36867c1749233c43368c2637ecf029"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90355.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90355"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ace5d3b6b49e8391beb4d7244348ba7da5298878"},{"fixed":"fc3762724a36867c1749233c43368c2637ecf029"},{"fixed":"75d2a4e2129b58bb0ddb842387299038495aad2a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90355.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90355.json"}}],"schema_version":"1.9.0"}