linux-cve-announce - CVE-2025-40069: drm/msm: Fix obj leak in VM

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Message-ID: <2025102818-CVE-2025-40069-ebb6@gregkh>
Date: Tue, 28 Oct 2025 12:48:46 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40069: drm/msm: Fix obj leak in VM_BIND error path

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

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

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

drm/msm: Fix obj leak in VM_BIND error path

If we fail a handle-lookup part way thru, we need to drop the already
obtained obj references.

Patchwork: https://patchwork.freedesktop.org/patch/669784/

The Linux kernel CVE team has assigned CVE-2025-40069 to this issue.


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

	Issue introduced in 6.17 with commit 2e6a8a1fe2b262a6dfd0a65041fcd830ee1e7143 and fixed in 6.17.3 with commit 2b512909a291a964cfcf6b58de13256ab3e848c4
	Issue introduced in 6.17 with commit 2e6a8a1fe2b262a6dfd0a65041fcd830ee1e7143 and fixed in 6.18-rc1 with commit 278f8904434aa96055e793936b5977c010549e28

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-2025-40069
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/gpu/drm/msm/msm_gem_vma.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/2b512909a291a964cfcf6b58de13256ab3e848c4
	https://git.kernel.org/stable/c/278f8904434aa96055e793936b5977c010549e28