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Date: Tue, 9 Mar 2021 09:56:16 +0100
From: Mauro Matteo Cascella <>
Subject: CVE-2021-3409 QEMU: sdhci: incomplete fix for CVE-2020-17380/CVE-2020-25085


QEMU upstream commit [1] was supposed to fix CVE-2020-17380 and
CVE-2020-25085, both involving a heap buffer overflow in the SDHCI
controller emulation code. In fact, commit [1] turned out to be
incomplete, in that it was still possible to reproduce the same
issue(s) with specially crafted input, inducing a bogus transfer and
subsequent out-of-bounds read/write access in sdhci_do_adma() or

A new series has been proposed (not merged yet) to address those
issues, and CVE-2021-3409 was assigned to facilitate
tracking/backporting of the new patch.

Old patch:

New patch series:

CVE-2021-3409 assigned by Red Hat, Inc.

Best regards.
Mauro Matteo Cascella
Red Hat Product Security
PGP-Key ID: BB3410B0

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