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Date: Thu, 25 Feb 2021 16:41:43 +0530 (IST)
From: P J P <>
To: oss security list <>
Subject: CVE-2021-20255 QEMU: net: eepro100: stack overflow via


A stack overflow via infinite recursion issue was found in the eepro100 i8255x 
device emulator of QEMU. It could occur while processing controller commands 
due to DMA re-entrancy issue. A guest user/process may use this flaw to 
consume cpu cycles or crash the QEMU process on the host resulting in DoS 

Upstream patch:

'CVE-2021-20255' assigned by Red Hat Inc.

This issue was reported by Sergej Schumilo, Cornelius Aschermann and Simon 
Werner of Ruhr-University Bochum.

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

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