From: Deepanshu Kartikey <redacted>

commit 7d73872d949c488a1d7c308031d6a9d89b5e0a8b upstream.

When NL80211_TDLS_ENABLE_LINK is called, the code only checks if the
station exists but not whether it is actually a TDLS station. This
allows the operation to proceed for non-TDLS stations, causing
unintended side effects like modifying channel context and HT
protection before failing.

Add a check for sta->sta.tdls early in the ENABLE_LINK case, before
any side effects occur, to ensure the operation is only allowed for
actual TDLS peers.

Reported-by: syzbot+56b6a844a4ea74487b7b@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=56b6a844a4ea74487b7b
Tested-by: syzbot+56b6a844a4ea74487b7b@syzkaller.appspotmail.com
Suggested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Deepanshu Kartikey <redacted>
Link: https://patch.msgid.link/20260313092417.520807-1-kartikey406@gmail.com
Signed-off-by: Johannes Berg <redacted>
[ Alexey: Adapted to the older sta_mtx locking and error-handling flow. ]
Signed-off-by: Alexey Panov <redacted>
---
Backport fix for CVE-2026-43052
 net/mac80211/tdls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index e01e4daeb8cd..66e32f1d0a98 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c

@@ -1380,7 +1380,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 
 		mutex_lock(&local->sta_mtx);
 		sta = sta_info_get(sdata, peer);
-		if (!sta) {
+		if (!sta || !sta->sta.tdls) {
 			mutex_unlock(&local->sta_mtx);
 			ret = -ENOLINK;
 			break;

-- 
2.47.3