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List:       oss-security
Subject:    [oss-security] CVE-2019-3900 Kernel: vhost_net: infinite loop while receiving packets leads to DoS
From:       P J P <ppandit () redhat ! com>
Date:       2019-04-25 9:21:18
Message-ID: nycvar.YSQ.7.76.1904251435470.3256 () xnncv
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   Hello,

An infinite loop issue was found in the vhost_net kernel module, while 
handling incoming packets in handle_rx(). It could occur if one end sends 
packets faster than the other end can process them.

A guest user, maybe remote one, could use this flaw to stall the vhost_net 
kernel thread, resulting in a DoS scenario.

Upstream patch:
---------------
   -> https://www.spinics.net/lists/kernel/msg3111012.html

This issue was discovered by Jason Wang(CC'd) of Red Hat Inc.
'CVE-2019-3900' assigned by Red Hat Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
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