Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [day] [month] [year] [list]
Date: Thu, 25 Feb 2021 16:58:53 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Ruhr-University Bochum <>, 
    Cheolwoo Myung <>, Alexander Bulekov <>
Subject: CVE-2021-20257 QEMU: net: e1000: infinite loop while processing
 transmit descriptors


An infinite loop issue was found in the e1000 NIC emulator of the QEMU. It 
occurs while processing transmit (tx) descriptors in process_tx_desc, if 
various descriptor fields are initialised with invalid values. A guest may use 
this flaw to consume cpu cycles on the host resulting in DoS scenario.

Upstream patch:

'CVE-2021-20257' assigned by Red Hat Inc.

This issue was independently reported by Sergej Schumilo, Cornelius 
Aschermann, Simon Werner of Ruhr-University Bochum; Cheolwoo Myung of Seoul 
National University; And Alexander Bulekov (CC'd).

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

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.