linux-cve-announce - CVE-2022-49750: cpufreq: CPPC: Add u64 casts to avoid overflowing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025032700-CVE-2022-49750-743d@gregkh>
Date: Thu, 27 Mar 2025 17:43:08 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49750: cpufreq: CPPC: Add u64 casts to avoid overflowing

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

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

cpufreq: CPPC: Add u64 casts to avoid overflowing

The fields of the _CPC object are unsigned 32-bits values.
To avoid overflows while using _CPC's values, add 'u64' casts.

The Linux kernel CVE team has assigned CVE-2022-49750 to this issue.


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

	Fixed in 6.1.9 with commit 7d596bbc66a52ff2c7a83d7e0ee840cb07e2a045
	Fixed in 6.2 with commit f5f94b9c8b805d87ff185caf9779c3a4d07819e3

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-2022-49750
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:
	drivers/cpufreq/cppc_cpufreq.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/7d596bbc66a52ff2c7a83d7e0ee840cb07e2a045
	https://git.kernel.org/stable/c/f5f94b9c8b805d87ff185caf9779c3a4d07819e3