linux-cve-announce - CVE-2023-53482: iommu: Fix error unwind in iommu_group

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Message-ID: <2025100113-CVE-2023-53482-ade3@gregkh>
Date: Wed,  1 Oct 2025 13:42:52 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53482: iommu: Fix error unwind in iommu_group_alloc()

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

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

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

iommu: Fix error unwind in iommu_group_alloc()

If either iommu_group_grate_file() fails then the
iommu_group is leaked.

Destroy it on these error paths.

Found by kselftest/iommu/iommufd_fail_nth

The Linux kernel CVE team has assigned CVE-2023-53482 to this issue.


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

	Issue introduced in 4.11 with commit bc7d12b91bd35477fd650c4d72b61239de9d9066 and fixed in 5.15.99 with commit f119ef452e2d82d912797273cb790a86f1125b3e
	Issue introduced in 4.11 with commit bc7d12b91bd35477fd650c4d72b61239de9d9066 and fixed in 6.1.16 with commit 4c23124b45ee0aa895ed8d5d08871ae6b15ee336
	Issue introduced in 4.11 with commit bc7d12b91bd35477fd650c4d72b61239de9d9066 and fixed in 6.2.3 with commit 8602fa38a63fc689eca29c8c586fac2d8a1f8739
	Issue introduced in 4.11 with commit bc7d12b91bd35477fd650c4d72b61239de9d9066 and fixed in 6.3 with commit 4daa861174d56023c2068ddb03de0752f07fa199

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-2023-53482
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/iommu.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/f119ef452e2d82d912797273cb790a86f1125b3e
	https://git.kernel.org/stable/c/4c23124b45ee0aa895ed8d5d08871ae6b15ee336
	https://git.kernel.org/stable/c/8602fa38a63fc689eca29c8c586fac2d8a1f8739
	https://git.kernel.org/stable/c/4daa861174d56023c2068ddb03de0752f07fa199