From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/misc/issei/cdev.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 drivers/misc/issei/cdev.h (limited to 'drivers/misc/issei/cdev.h') diff --git a/drivers/misc/issei/cdev.h b/drivers/misc/issei/cdev.h new file mode 100644 index 000000000..30075a624 --- /dev/null +++ b/drivers/misc/issei/cdev.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2023-2026 Intel Corporation */ +#ifndef _ISSEI_CDEV_H_ +#define _ISSEI_CDEV_H_ + +struct device; +struct issei_device; +struct issei_dma_length; +struct issei_hw_ops; + +struct issei_device *issei_register(size_t hw_size, struct device *parent, + const struct issei_dma_length *dma_length, + const struct issei_hw_ops *ops); +void issei_deregister(struct issei_device *idev); + +#endif /* _ISSEI_CDEV_H_ */ -- cgit v1.3.1