linux-kernel - Re: CVE-2025-21991: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes

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Message-ID: <793ae4a30ab15d0993ce9152ce91b6b98a05b1a5.camel@oracle.com>
Date: Wed, 4 Jun 2025 09:24:12 +0000
From: Siddh Raman Pant <siddh.raman.pant@...cle.com>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: CVE-2025-21991: x86/microcode/AMD: Fix out-of-bounds on systems
 with CPU-less NUMA nodes

On Wed, 2 Apr 2025 13:51:58 +0100, Greg Kroah-Hartman wrote:
> In the Linux kernel, the following vulnerability has been resolved:
> 
> x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes
> 
> [...]
> 
> This does not have any security implications since flashing microcode is
> a privileged operation but I believe this has reliability implications by
> potentially corrupting memory while flashing a microcode update.

If it is explicitly specified that this does not have any security
implication, why is this a CVE?

IMO this should be rejected.

Thanks,
Siddh

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