linux-kernel - Re: CVE-2022-49355: xen: unexport __init-annotated xen_xlate_map_ballooned

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Message-ID: <3a71d712-fe63-4723-8a42-f12336561837@suse.com>
Date: Wed, 26 Feb 2025 08:45:25 +0100
From: Juergen Gross <jgross@...e.com>
To: cve@...nel.org, linux-kernel@...r.kernel.org,
 linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: CVE-2022-49355: xen: unexport __init-annotated
 xen_xlate_map_ballooned_pages()

On 26.02.25 03:10, Greg Kroah-Hartman wrote:
> Description
> ===========
> 
> In the Linux kernel, the following vulnerability has been resolved:
> 
> xen: unexport __init-annotated xen_xlate_map_ballooned_pages()
> 
> EXPORT_SYMBOL and __init is a bad combination because the .init.text
> section is freed up after the initialization. Hence, modules cannot
> use symbols annotated __init. The access to a freed symbol may end up
> with kernel panic.

Please revoke this CVE. There is no way an unprivileged user could
trigger access to the freed symbol.


Juergen

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