From f4cdf6b43689e901a341e7147fcfb25057c38eae Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Thu, 26 Feb 2026 20:11:14 +0100 Subject: [PATCH] wifi: mt76: mt7996: Fix possible oob access in mt7996_mac_write_txwi_80211() [ Upstream commit 60862846308627e9e15546bb647a00de44deb27b ] Check frame length before accessing the mgmt fields in mt7996_mac_write_txwi_80211 in order to avoid a possible oob access. Fixes: 98686cd21624c ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260226-mt76-addba-req-oob-access-v1-1-b0f6d1ad4850@kernel.org Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7996/mac.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c index 502136691a69..0958961d2758 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c @@ -799,6 +799,7 @@ mt7996_mac_write_txwi_80211(struct mt7996_dev *dev, __le32 *txwi, u32 val; if (ieee80211_is_action(fc) && + skb->len >= IEEE80211_MIN_ACTION_SIZE + 1 && mgmt->u.action.category == WLAN_CATEGORY_BACK && mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ) { if (is_mt7990(&dev->mt76))