2024-05-27 10:58:28

by Jürgen Groß

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Subject: Re: CVE-2021-47377: kernel: xen/balloon: use a kernel thread instead a workqueue

Hi,

I'd like to dispute CVE-2021-47377: the issue fixed by upstream commit
8480ed9c2bbd56fc86524998e5f2e3e22f5038f6 can in no way be triggered by
an unprivileged user or by a remote attack of the system, as it requires
initiation of memory ballooning of the running system. This can be done
only by either a host admin or by an admin of the guest which might
suffer the detection of the hanging workqueue.

Please revoke this CVE.


Juergen

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2024-05-28 19:03:05

by Greg Kroah-Hartman

[permalink] [raw]
Subject: Re: CVE-2021-47377: kernel: xen/balloon: use a kernel thread instead a workqueue

On Mon, May 27, 2024 at 12:58:16PM +0200, Juergen Gross wrote:
> Hi,
>
> I'd like to dispute CVE-2021-47377: the issue fixed by upstream commit
> 8480ed9c2bbd56fc86524998e5f2e3e22f5038f6 can in no way be triggered by
> an unprivileged user or by a remote attack of the system, as it requires
> initiation of memory ballooning of the running system. This can be done
> only by either a host admin or by an admin of the guest which might
> suffer the detection of the hanging workqueue.
>
> Please revoke this CVE.

Ah, good catch, this came in as part of the GSD import, and I missed
that this required that type of permissions. Now revoked, thanks for
the review!

greg k-h