From: Michael Bommarito <michael.bommarito@gmail.com>
To: Krzysztof Kozlowski <krzk@kernel.org>, Dan Carpenter <error27@gmail.com>
Cc: Jakub Kicinski <kuba@kernel.org>, Kees Cook <kees@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] nfc: pn533: bound device-supplied lengths in the receive path
Date: Wed, 17 Jun 2026 22:59:51 -0400 [thread overview]
Message-ID: <20260618025953.1878757-1-michael.bommarito@gmail.com> (raw)
The PN533 receive path trusts several device-supplied length fields and
reads past the received buffer when they exceed it. The receive skb is
sized to the device's USB transfer length, so a malicious or counterfeit
PN53x reader triggers out-of-bounds reads in the standard/ACR122 frame
validators, in Type A target parsing (nfcid_len), and in the autopoll
record walk.
Michael Bommarito (2):
nfc: pn533: bound device-supplied lengths in the receive path
nfc: pn533: add KUnit tests for receive-path bounds
drivers/nfc/pn533/Kconfig | 9 +++
drivers/nfc/pn533/pn533.c | 125 +++++++++++++++++++++++++++++++++++++-
drivers/nfc/pn533/pn533.h | 3 +-
drivers/nfc/pn533/usb.c | 12 +++-
4 files changed, 144 insertions(+), 5 deletions(-)
--
2.53.0
next reply other threads:[~2026-06-18 3:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-18 2:59 Michael Bommarito [this message]
2026-06-18 2:59 ` [PATCH 1/2] " Michael Bommarito
2026-06-18 2:59 ` [PATCH 2/2] nfc: pn533: add KUnit tests for receive-path bounds Michael Bommarito
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