linux-cve-announce - CVE-2022-49633: icmp: Fix data-races around sysctl_icmp_echo_enable

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Message-ID: <2025022617-CVE-2022-49633-ddaf@gregkh>
Date: Wed, 26 Feb 2025 03:23:16 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49633: icmp: Fix data-races around sysctl_icmp_echo_enable_probe.

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

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

icmp: Fix data-races around sysctl_icmp_echo_enable_probe.

While reading sysctl_icmp_echo_enable_probe, it can be changed
concurrently.  Thus, we need to add READ_ONCE() to its readers.

The Linux kernel CVE team has assigned CVE-2022-49633 to this issue.

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

	Issue introduced in 5.13 with commit d329ea5bd8845f0b196bf41b18b6173340d6e0e4 and fixed in 5.15.56 with commit cce955efa0ab81f7fb72e22beed372054c86005c
	Issue introduced in 5.13 with commit d329ea5bd8845f0b196bf41b18b6173340d6e0e4 and fixed in 5.18.13 with commit 05c615033174f1d19374f42285ccd8e9af13e427
	Issue introduced in 5.13 with commit d329ea5bd8845f0b196bf41b18b6173340d6e0e4 and fixed in 5.19 with commit 4a2f7083cc6cb72dade9a63699ca352fad26d1cd

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-2022-49633
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:
	net/ipv4/icmp.c
	net/ipv6/icmp.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/cce955efa0ab81f7fb72e22beed372054c86005c
	https://git.kernel.org/stable/c/05c615033174f1d19374f42285ccd8e9af13e427
	https://git.kernel.org/stable/c/4a2f7083cc6cb72dade9a63699ca352fad26d1cd