linux-cve-announce - CVE-2025-71122: iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2026011416-CVE-2025-71122-1921@gregkh>
Date: Wed, 14 Jan 2026 16:06:27 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71122: iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

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

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

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

iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

syzkaller found it could overflow math in the test infrastructure and
cause a WARN_ON by corrupting the reserved interval tree. This only
effects test kernels with CONFIG_IOMMUFD_TEST.

Validate the user input length in the test ioctl.

The Linux kernel CVE team has assigned CVE-2025-71122 to this issue.


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

	Issue introduced in 6.2 with commit f4b20bb34c83dceade5470288f48f94ce3598ada and fixed in 6.6.120 with commit 4cc829d61f10c20523fd4085c1546e741a792a97
	Issue introduced in 6.2 with commit f4b20bb34c83dceade5470288f48f94ce3598ada and fixed in 6.12.64 with commit e6c122cffcbb2e84d321ec8ba0e38ce8e7c10925
	Issue introduced in 6.2 with commit f4b20bb34c83dceade5470288f48f94ce3598ada and fixed in 6.18.3 with commit b166b8e0a381429fefd9180e67fbc834b3cee82f
	Issue introduced in 6.2 with commit f4b20bb34c83dceade5470288f48f94ce3598ada and fixed in 6.19-rc2 with commit e6a973af11135439de32ece3b9cbe3bfc043bea8

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-2025-71122
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/iommu/iommufd/selftest.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/4cc829d61f10c20523fd4085c1546e741a792a97
	https://git.kernel.org/stable/c/e6c122cffcbb2e84d321ec8ba0e38ce8e7c10925
	https://git.kernel.org/stable/c/b166b8e0a381429fefd9180e67fbc834b3cee82f
	https://git.kernel.org/stable/c/e6a973af11135439de32ece3b9cbe3bfc043bea8