linux-cve-announce - CVE-2023-53080: xsk: Add missing overflow check in xdp_umem

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Message-ID: <2025050216-CVE-2023-53080-1a45@gregkh>
Date: Fri,  2 May 2025 17:55:45 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53080: xsk: Add missing overflow check in xdp_umem_reg

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

xsk: Add missing overflow check in xdp_umem_reg

The number of chunks can overflow u32. Make sure to return -EINVAL on
overflow. Also remove a redundant u32 cast assigning umem->npgs.

The Linux kernel CVE team has assigned CVE-2023-53080 to this issue.


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

	Issue introduced in 4.18 with commit bbff2f321a864ee07c9d3d1245af498023146951 and fixed in 5.10.177 with commit 580634b03a55f04a3c1968bcbd97736c079c6601
	Issue introduced in 4.18 with commit bbff2f321a864ee07c9d3d1245af498023146951 and fixed in 5.15.105 with commit 3cfc3564411acf96bf2fb791f706a1aa4f872c1d
	Issue introduced in 4.18 with commit bbff2f321a864ee07c9d3d1245af498023146951 and fixed in 6.1.22 with commit a069909acc4435eeb41d05ccc03baa447cc01b7e
	Issue introduced in 4.18 with commit bbff2f321a864ee07c9d3d1245af498023146951 and fixed in 6.2.9 with commit bb2e3bfb2a79db0c2057c6f701b782954394c67f
	Issue introduced in 4.18 with commit bbff2f321a864ee07c9d3d1245af498023146951 and fixed in 6.3 with commit c7df4813b149362248d6ef7be41a311e27bf75fe

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-2023-53080
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/xdp/xdp_umem.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/580634b03a55f04a3c1968bcbd97736c079c6601
	https://git.kernel.org/stable/c/3cfc3564411acf96bf2fb791f706a1aa4f872c1d
	https://git.kernel.org/stable/c/a069909acc4435eeb41d05ccc03baa447cc01b7e
	https://git.kernel.org/stable/c/bb2e3bfb2a79db0c2057c6f701b782954394c67f
	https://git.kernel.org/stable/c/c7df4813b149362248d6ef7be41a311e27bf75fe