In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs<\/p>\n
IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted
\nfrom a PRIO_ACCESS ML element PER_STA_PROFILE subelement can be 0..15.
\nsdata->link[] has IEEE80211_MLD_MAX_NUM_LINKS (15) entries (indices 0..14),
\nmaking index 15 out-of-bounds.<\/p>\n
A connected WiFi 7 AP can trigger this by sending an EPCS Enable Response
\naction frame with a PER_STA_PROFILE subelement where link_id = 15. The
\nunsolicited-notification path (dialog_token = 0) is reachable any time
\nEPCS is already enabled, without any prior client request.<\/p>\n
sdata->link[15] reads into the first word of sdata->activate_links_work
\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),
\nso the NULL check on the result does not catch the invalid access. The
\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which
\ndereferences link->sdata and crashes the kernel.<\/p>\n
The same class of bug was fixed for ieee80211_ml_reconfiguration() by
\ncommit 162d331d833d (“wifi: mac80211: bounds-check link_id in
\nieee80211_ml_reconfiguration”).<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs<\/p>\n
IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted
\nf<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15022","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15022","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15022"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}