linux-cve-announce - CVE-2022-49279: NFSD: prevent integer overflow on 32 bit systems

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Message-ID: <2025022631-CVE-2022-49279-811f@gregkh>
Date: Wed, 26 Feb 2025 02:58:04 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49279: NFSD: prevent integer overflow on 32 bit systems

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

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

NFSD: prevent integer overflow on 32 bit systems

On a 32 bit system, the "len * sizeof(*p)" operation can have an
integer overflow.

The Linux kernel CVE team has assigned CVE-2022-49279 to this issue.


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

	Fixed in 4.19.238 with commit 3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8
	Fixed in 5.4.189 with commit ce1aa09cc14ed625104acc2d487bd92b9a88efe2
	Fixed in 5.10.110 with commit 7af164fa2f1abc577d357d22d83a2f3490875d7e
	Fixed in 5.15.33 with commit 303cd6173dce0a28d26526c77814eb90a41bd898
	Fixed in 5.16.19 with commit 79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c
	Fixed in 5.17.2 with commit e4195d27306ea468a6dc3a27af6f586709951229
	Fixed in 5.18 with commit 23a9dbbe0faf124fc4c139615633b9d12a3a89ef

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-2022-49279
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/linux/sunrpc/xdr.h


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/3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8
	https://git.kernel.org/stable/c/ce1aa09cc14ed625104acc2d487bd92b9a88efe2
	https://git.kernel.org/stable/c/7af164fa2f1abc577d357d22d83a2f3490875d7e
	https://git.kernel.org/stable/c/303cd6173dce0a28d26526c77814eb90a41bd898
	https://git.kernel.org/stable/c/79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c
	https://git.kernel.org/stable/c/e4195d27306ea468a6dc3a27af6f586709951229
	https://git.kernel.org/stable/c/23a9dbbe0faf124fc4c139615633b9d12a3a89ef