linux-kernel - Re: CVE-2024-27410: wifi: nl80211: reject iftype change with mesh ID change

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Date: Wed, 22 May 2024 12:28:59 +0000
From: Siddh Raman Pant <siddh.raman.pant@...cle.com>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "cve@...nel.org" <cve@...nel.org>,
        "linux-cve-announce@...r.kernel.org"
	<linux-cve-announce@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: Re: CVE-2024-27410: wifi: nl80211: reject iftype change with mesh ID
 change

On Fri, 17 May 2024 13:52:02 +0200, Greg Kroah-Hartman wrote:
> In the Linux kernel, the following vulnerability has been resolved:
> 
> wifi: nl80211: reject iftype change with mesh ID change
> 
> It's currently possible to change the mesh ID when the
> interface isn't yet in mesh mode, at the same time as
> changing it into mesh mode. This leads to an overwrite
> of data in the wdev->u union for the interface type it
> currently has, causing cfg80211_change_iface() to do
> wrong things when switching.
> 
> [...]
> 
> The Linux kernel CVE team has assigned CVE-2024-27410 to this issue.

This does not apply to versions below 6.0, as the union was not backported.
The fix commit mentioned is incorrect, it should be 7b0a0e3c3a88.

Thanks,
Siddh

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