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 9B0C653ECF4 for ; Tue, 8 Sep 2026 12:42:36 +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=1788871357; cv=none; b=bGQeXCbu3mFKRvQ6/Q8gxFGwbq+FIT5qllNHAIj9lEy4wnc0VNVUQJ6FWs4IcYKZN5b1VtDDAAeGwMmGa9EffpO2iWRq2+eI0q3+HjSxjMr45hxUXgP3onCFgrPt2/Qgs3fJGzVlCOZYuIv8s/keopdC0na4ZX4fuGCc1LhsirQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788871357; c=relaxed/simple; bh=Xl2j1VyoffR5clE73EgPnI39GBaO4C2lBFSdnwpso4k=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=ihP1e4dzuMjXTvWXN19sB+oPGQh0MBJe968KEt4oEwxYvhUFoKRKnlw7EfShuwXXagUsh4q09/7M9JTfMhHubLC/T09zJtmvH52MJtjq0TcRfYRLbbHLPKM3ryR5azocg830tTbwU2oZOiX24+tNzaLEqgxpNbLqh0Ie0HiYnfA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Mvt8ecWj; 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="Mvt8ecWj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B715A1F00A3A; Tue, 8 Sep 2026 12:42:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788871356; bh=2ctIT/P5LDlNL+bzZwzVc7FJMvIrMSNTzeWVTGJ830U=; h=Subject:To:Cc:From:Date; b=Mvt8ecWjL/7KURq/y+XWkH83bOirCBOqtzCNxiVC0EeWNyVxGxLnOOeLD+tt8QiGw gd9/mYNgXbLiFB8jtITr0CJbbgFsb8LwWKE02hKmRVezNg5oKr3qQ0GZYAk/pDw1CC awfsduN1svlUmWQrOLwsKmd19D+pQ8NzXiY+iMw0= Subject: FAILED: patch "[PATCH] staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()" failed to apply to 6.6-stable tree To: meatuni001@gmail.com,gregkh@linuxfoundation.org Cc: From: Date: Tue, 08 Sep 2026 14:42:21 +0200 Message-ID: <2026090821-buffer-epidemic-346b@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 6.6-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-6.6.y git checkout FETCH_HEAD git cherry-pick -x 28a289beaf226b30b1e6e7d7b1a2946fe2d6e852 # git commit -s git send-email --to '' --in-reply-to '2026090821-buffer-epidemic-346b@gregkh' --subject-prefix 'PATCH 6.6.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 */ }