linux-cve-announce - CVE-2025-37751: x86/cpu: Avoid running off the end of an AMD erratum table

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Message-ID: <2025050137-CVE-2025-37751-8ed2@gregkh>
Date: Thu,  1 May 2025 14:56:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37751: x86/cpu: Avoid running off the end of an AMD erratum table

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

x86/cpu: Avoid running off the end of an AMD erratum table

The NULL array terminator at the end of erratum_1386_microcode was
removed during the switch from x86_cpu_desc to x86_cpu_id. This
causes readers to run off the end of the array.

Replace the NULL.

The Linux kernel CVE team has assigned CVE-2025-37751 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.14 with commit f3f3251526739bb975b97f840c56b3054dba8638 and fixed in 6.14.3 with commit 1b518f73f1b6f59e083ec33dea22d9a1a275a970
	Issue introduced in 6.14 with commit f3f3251526739bb975b97f840c56b3054dba8638 and fixed in 6.15-rc2 with commit f0df00ebc57f803603f2a2e0df197e51f06fbe90

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-37751
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	arch/x86/kernel/cpu/amd.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/1b518f73f1b6f59e083ec33dea22d9a1a275a970
	https://git.kernel.org/stable/c/f0df00ebc57f803603f2a2e0df197e51f06fbe90