linux-cve-announce - CVE-2024-46757: hwmon: (nct6775-core) Fix underflows seen when writing limit attributes

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Message-ID: <2024091841-CVE-2024-46757-4fbb@gregkh>
Date: Wed, 18 Sep 2024 09:16:52 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-46757: hwmon: (nct6775-core) Fix underflows seen when writing limit attributes

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

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

hwmon: (nct6775-core) Fix underflows seen when writing limit attributes

DIV_ROUND_CLOSEST() after kstrtol() results in an underflow if a large
negative number such as -9223372036854775808 is provided by the user.
Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations.

The Linux kernel CVE team has assigned CVE-2024-46757 to this issue.


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

	Fixed in 4.19.322 with commit 298a55f11edd
	Fixed in 5.4.284 with commit d6035c55fa9a
	Fixed in 5.10.226 with commit 8a1e958e2664
	Fixed in 5.15.167 with commit 02bb3b4c7d56
	Fixed in 6.1.110 with commit 0c23e18cef20
	Fixed in 6.6.51 with commit 2f695544084a
	Fixed in 6.10.10 with commit 996221b03099
	Fixed in 6.11 with commit 0403e10bf082

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-2024-46757
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/hwmon/nct6775-core.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/298a55f11edd811f2189b74eb8f53dee34d4f14c
	https://git.kernel.org/stable/c/d6035c55fa9afefc23f85f57eff1d4a1d82c5b10
	https://git.kernel.org/stable/c/8a1e958e26640ce015abdbb75c8896301b9bf398
	https://git.kernel.org/stable/c/02bb3b4c7d5695ff4be01e0f55676bba49df435e
	https://git.kernel.org/stable/c/0c23e18cef20b989a9fd7cb0a745e1259b969159
	https://git.kernel.org/stable/c/2f695544084a559f181cafdfd3f864c5ff9dd1db
	https://git.kernel.org/stable/c/996221b030995cc5f5baa4a642201d64b62a17cd
	https://git.kernel.org/stable/c/0403e10bf0824bf0ec2bb135d4cf1c0cc3bf4bf0