From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 226D053ECEC for ; Tue, 8 Sep 2026 12:42:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788871363; cv=none; b=dMdEHi48oYarK6U7Kr1kjGdKeQgP24nxO1uZ0BwEUA52tq+nggeRf5t3mOHaBmpjs5U0i1BtH4RVl56yTjpIR75SQviAJrgJekbwUyLDeRXXBhBGShPh8jDzfBHY+AbJ8722gRPT6b4pmhYMEEUvtRyUCuSI9BR/MKQ3qLFrJok= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788871363; c=relaxed/simple; bh=tKxls1w/oimog292YsjOug3VhIsOUSz2u36yETT/bNc=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=HEq5o2NrpsZzNCzxgBz2DxCyx729Z3s9SFjsXSmaW3RiSBxTo8KSm0M/qe+r3BKBgFriOOm3TmKmIofX7HKPWpobHr3b7+hV7NxOL0Gda7x7XI2N9M+7774Pdv5SEGsmjxqYRhNge25TKuStFRVmMTv7/UPhj/20XQm3jlO1H+k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Uc/GRI0a; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Uc/GRI0a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F29A1F00A3A; Tue, 8 Sep 2026 12:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788871362; bh=9gJe3i6gFb4hfSSqO9Bn/8/U3wHiDJeX7FJDY6DTuus=; h=Subject:To:Cc:From:Date; b=Uc/GRI0aROwqUtqZYoxlzdvBQNiEAotHe0yZuaZyIka40eTRwpL5Hge7YZFdTPNgs cDc8LsBy0u2Qqv1X1wVQU4QH0unpytHdPoNq+tUXiwE5VMvNbqxaW1EId8aElbji44 VRH1dBu/oNUKSMi0w031UlIhVeZfJdvqMm+SKU7A= Subject: FAILED: patch "[PATCH] staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()" failed to apply to 5.15-stable tree To: meatuni001@gmail.com,gregkh@linuxfoundation.org Cc: From: Date: Tue, 08 Sep 2026 14:42:22 +0200 Message-ID: <2026090822-rematch-anvil-8a95@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 28a289beaf226b30b1e6e7d7b1a2946fe2d6e852 # git commit -s git send-email --to '' --in-reply-to '2026090822-rematch-anvil-8a95@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 28a289beaf226b30b1e6e7d7b1a2946fe2d6e852 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:56 +0500 Subject: [PATCH] staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie() rtw_restruct_wmm_ie() scans in_ie for a WMM IE with: while (i < in_len) { ... if (i + 5 < in_len && in_ie[i] == 0xDD && ...) { ... break; } i += (in_ie[i + 1] + 2); /* to the next IE element */ } When the "i + 5 < in_len" match check fails simply because i is within 5 bytes of the end of the buffer (i.e. no WMM IE was found near the tail of in_ie), execution falls through to "i += (in_ie[i + 1] + 2)", which reads in_ie[i + 1]. If i == in_len - 1 at that point, this is a 1-byte out-of-bounds read of an attacker-influenced IE buffer built from association/scan data. Commit a75281626fc8f ("staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie") added the "i + 5 < in_len" guard to the match condition itself, but did not add an equivalent guard before the fallthrough advance, so the same class of OOB read remained reachable through the non-matching path. Add an explicit bounds check before advancing to the next IE. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Link: https://patch.msgid.link/20260728125456.32359-4-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c index fc46b33b836a..d18768a51b19 100644 --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c @@ -1975,6 +1975,9 @@ int rtw_restruct_wmm_ie(struct adapter *adapter, u8 *in_ie, u8 *out_ie, uint in_ break; } + if (i + 1 >= in_len) + break; + i += (in_ie[i + 1] + 2); /* to the next IE element */ }