From: Juergen Gross <jgross@suse.com>
To: cve@kernel.org, linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"security@xenproject.org" <security@xenproject.org>
Subject: Re: CVE-2021-47574: xen/netfront: harden netfront against event channel storms
Date: Thu, 20 Jun 2024 09:54:11 +0200 [thread overview]
Message-ID: <87d1ece9-246f-4e53-bb7d-4cd965d56dbd@suse.com> (raw)
In-Reply-To: <2024061914-CVE-2021-47574-18b4@gregkh>
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On 19.06.24 16:54, Greg Kroah-Hartman wrote:
> Description
> ===========
>
> In the Linux kernel, the following vulnerability has been resolved:
>
> xen/netfront: harden netfront against event channel storms
>
> The Xen netfront driver is still vulnerable for an attack via excessive
> number of events sent by the backend. Fix that by using lateeoi event
> channels.
>
> For being able to detect the case of no rx responses being added while
> the carrier is down a new lock is needed in order to update and test
> rsp_cons and the number of seen unconsumed responses atomically.
>
> This is part of XSA-391
When issuing XSA-391 the Xen security team already assigned CVE-2021-28712
to this issue.
Juergen
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parent reply other threads:[~2024-06-20 7:54 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <2024061914-CVE-2021-47574-18b4@gregkh>]
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