From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78BFE2749CF for ; Tue, 19 May 2026 01:23:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779153782; cv=none; b=WwwWgDRLuO3ZuNdfFFSgW+y0I6FMMv4uO4uMwcfSk58pkZgLIGbj0kPRos3fX571ycyPjSg/dT4wO4ZAckYZndNfW4cw6mOBCv3qZwC9IjSoHZJ3pv2IXCGVmlruqDFtvyYpj2wjQzMJQSudOzDSvx1jm//Vvs9cOJ3cNaYLpyA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779153782; c=relaxed/simple; bh=Y08IJeT7eg1AM0JqdRzNKlNYQAhW+GW1ufuXhwZO65Y=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Qu/kIm1f6b6q2zB/MvKdjOJtM5Le/s4/yF7+/AdeC17Atq6gkTFfYkQamu7917G1axOjgu/8ZCW1kiC8PAoJlvS+iWDs3TKxpETbduTAZhdnVuQ1zcpBuYpMPTmwS1+nfX3K6nn+NPf7i8IirHAfkvHg4ynn5zXVeqNWF8R/YxM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=QUDGCFzk; arc=none smtp.client-ip=209.85.128.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QUDGCFzk" Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-4891b0786beso20790345e9.1 for ; Mon, 18 May 2026 18:23:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779153779; x=1779758579; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=IVADxebGolKTYEx0uBYNzU/+4nP14YmYsqJ1cjkXF0w=; b=QUDGCFzkcVBMZfROdKaVoJzpEXnAiKA7dJQVzF8qcqlQMf1qpHvIqc0+ihojkDWUG7 k4XSTZLqjq4H9HR/3ZG4rRQa/aUAsFv2seqCuRocfmSN9ToVK6QE263x0YVoF1Jte+Ug KsumIl9NsoC2UzR1O/LVuoOlJy3JgSB6VabxmOQLUPIZk323VRa8i2dyEl7/jXpSQyNw I1pn04wgh3s+BY/P5QHgrrGQ+7MIG+WEzN3v4to9nAbBWoiClGfXgBvXuEL/ZT+dmoZz vQouI5aolZhQmeUnkzM0/bEztiw+ePUL1QlVYhoouzTpBhGz6EgmmgkLc4fDMeSvgQ0t m0vQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779153779; x=1779758579; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=IVADxebGolKTYEx0uBYNzU/+4nP14YmYsqJ1cjkXF0w=; b=mE3PuLDQRyOGw/oO2Bpdhp9pPx9KmQsCnhVjaH+xBUP2VvTTw5UKoEtfktKysFrYfI bdh9qC8QbZpcptHagXhHR839y67qk1QXhl2ADtWcQFeDRcXqqRdhVMyQg7EOlDN0DuEP ldmMKeKGrhYayWh14Kz8RJpjeXn0sA/KK3Gm2QmG9sCzwo1DPCqEpFUiphP90spM78Zn MvQ3bLTKFHGreyWR815EScedybYOmXsZ5wqCd4UxYagVWlJKi932SjyK8UFRdNIIU8Y+ K9ehNJGQwsP+Uf5WfKdq3qqQS1xnSTtdpegNznuZYlVFQKEeD6qV2lX6BJj3JWl1IUHP zriw== X-Gm-Message-State: AOJu0YyghdjrAxUJYi68o9UiMqmGjOsZ3XpGFD91+0Nz9q2tExDDKdEx pMCD3TORVyoZ5V/jHNodm+q8S09c9ME6DUGwEKPYDAN2se+0kk/wIVq7cNiBTM22d8c= X-Gm-Gg: Acq92OEEL0xOi6Mvjzh+itv6hf7a9ad9RfN9OLmidkxu9LlstPNppw6xrBHoGnHeXsm JlaZ+FOcLBQEadU1ZJrY6733iO8/kQ7C+dP8d4/GmadR3WsfC+IjkZwF+Ep8BM7PUwwTB38/fdP yCXqL3SNNrZL1HnQzY/1dVTVD8E1+13gH14PUNqegIaX6FAy6GsG4YBny/cpTL+I34wxfXwFmIu wfMCpq32jsQTlOkiVyQxenCPB+0nbBLL+4TwRHQbzz2ATmtAc54kmJdxxH0PtLDSw5AwLAxW5qW ktRpklb96muChqQK7mkQ8+H/6n5ATfkkPvO4Fq7rT1MmhwwFJlg6e2odFhjtDEetbPM+FE+PsnA 82NzHqooLpq32hfWudrIUnNS/1cI5LuFir2pqnc2x+Ok+NjxMylPFhJ87cQ+e75HJHh9a0f+gqZ P+xgXRgfcXWcXJRMT0JwHRb5nXP9aAXrDJEMNkxQDP34xf7aab300gqwjXJk8UTj0NLrwYjQfDc Q== X-Received: by 2002:a05:600c:46ce:b0:48f:d2b5:d7 with SMTP id 5b1f17b1804b1-48fe60edd2dmr255838215e9.12.1779153779331; Mon, 18 May 2026 18:22:59 -0700 (PDT) Received: from node ([202.47.63.86]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45d9ec39ff1sm44255416f8f.10.2026.05.18.18.22.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 May 2026 18:22:59 -0700 (PDT) From: Muhammad Bilal To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, oe-linux-nfc@lists.linux.dev, david+nfc@ixit.cz, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, stable@vger.kernel.org, Muhammad Bilal Subject: [PATCH net 0/2] nfc: llcp: fix OOB reads and integer bugs in TLV parsers Date: Mon, 18 May 2026 21:19:35 -0400 Message-ID: <20260519011937.12903-1-meatuni001@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series fixes memory safety bugs in the NFC LLCP TLV parsing code, reachable from a remote NFC peer via crafted LLCP frames. Patch 1 fixes nfc_llcp_parse_gb_tlv() and nfc_llcp_parse_connection_tlv(): - u8 offset wraps to zero after 255 (widened to u16) - OOB read of TLV header on truncated buffer - OOB read of value field via attacker-controlled length byte Patch 2 fixes nfc_llcp_recv_snl(): - OOB read of TLV header when tlv_len - offset == 1 - OOB read of SDREQ value via attacker-controlled length - SIZE_MAX underflow when length == 0 in service_name_len, bypassing the sn_len == 0 guard in nfc_llcp_sock_from_sn() Previously reported to security@kernel.org on 2026-05-15. Willy Tarreau advised posting to public lists as NFC is currently orphaned. Muhammad Bilal (2): nfc: llcp: fix OOB read and u8 offset wrap in TLV parsers nfc: llcp: add missing bounds checks in nfc_llcp_recv_snl() net/nfc/llcp_commands.c | 28 ++++++++++++++++++++++++++-- net/nfc/llcp_core.c | 23 +++++++++++++++++++++-- 2 files changed, 47 insertions(+), 4 deletions(-) -- 2.54.0