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List:       oss-security
Subject:    [oss-security] CVE-2021-3416 QEMU: net: infinite loop in loopback mode may lead tostack overflow
From:       P J P <ppandit () redhat ! com>
Date:       2021-02-26 14:58:15
Message-ID: 5s13663-1p72-s775-1762-6sp1qr114s39 () erqung ! pbz
[Download RAW message or body]

   Hello,

A potential stack overflow via infinite loop issue was found in various NIC 
emulators of QEMU. The said issue occurs in loopback mode of a NIC wherein 
reentrant DMA checks may get bypassed. A guest user/process may use this flaw 
to consume cpu cycles or crash the QEMU process on the host resulting in DoS 
scenario.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html
   -> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07484.html

'CVE-2021-3416' assigned via Red Hat Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D

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