linux-kernel - Re: CVE-2024-26908: x86/xen: Add some null pointer checking to smp.c

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Message-ID: <f73bb0fe-9ba6-46de-8732-bd372438068e@suse.com>
Date: Mon, 29 Apr 2024 13:53:44 +0200
From: Juergen Gross <jgross@...e.com>
To: gregkh@...uxfoundation.org
Cc: cve@...nel.org, linux-cve-announce@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
 "Xen.org security team" <security@....org>
Subject: Re: CVE-2024-26908: x86/xen: Add some null pointer checking to smp.c

Hi,

I'd like to dispute CVE-2024-26908: the issue fixed by upstream commit
3693bb4465e6e32a204a5b86d3ec7e6b9f7e67c2 can in no way be triggered by
an unprivileged user or by a remote attack of the system, as it requires
hotplug of (virtual) cpus to the running system. This can be done only by
either a host admin or by an admin of the guest which might suffer the
out-of-memory situation.

Please revoke this CVE.

Juergen

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