linux-cve-announce - CVE-2022-49578: ip: Fix data-races around sysctl_ip_prot

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Message-ID: <2025022607-CVE-2022-49578-6d9b@gregkh>
Date: Wed, 26 Feb 2025 03:22:21 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49578: ip: Fix data-races around sysctl_ip_prot_sock.

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

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

ip: Fix data-races around sysctl_ip_prot_sock.

sysctl_ip_prot_sock is accessed concurrently, and there is always a chance
of data-race.  So, all readers and writers need some basic protection to
avoid load/store-tearing.

The Linux kernel CVE team has assigned CVE-2022-49578 to this issue.


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

	Issue introduced in 4.11 with commit 4548b683b78137f8eadeb312b94e20bb0d4a7141 and fixed in 5.10.134 with commit 9add240f76af6d141d2eebd3a1558a0e503a993d
	Issue introduced in 4.11 with commit 4548b683b78137f8eadeb312b94e20bb0d4a7141 and fixed in 5.15.58 with commit 95724fe897a4ecf2be51452ef96e818568071664
	Issue introduced in 4.11 with commit 4548b683b78137f8eadeb312b94e20bb0d4a7141 and fixed in 5.18.15 with commit ef699813d99cc29e6e25c9f6da7766526cc8bd6e
	Issue introduced in 4.11 with commit 4548b683b78137f8eadeb312b94e20bb0d4a7141 and fixed in 5.19 with commit 9b55c20f83369dd54541d9ddbe3a018a8377f451

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-2022-49578
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:
	include/net/ip.h
	net/ipv4/sysctl_net_ipv4.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/9add240f76af6d141d2eebd3a1558a0e503a993d
	https://git.kernel.org/stable/c/95724fe897a4ecf2be51452ef96e818568071664
	https://git.kernel.org/stable/c/ef699813d99cc29e6e25c9f6da7766526cc8bd6e
	https://git.kernel.org/stable/c/9b55c20f83369dd54541d9ddbe3a018a8377f451