linux-cve-announce - CVE-2025-40339: drm/amdgpu: fix nullptr err of vm_handle

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Message-ID: <2025120911-CVE-2025-40339-82ee@gregkh>
Date: Tue,  9 Dec 2025 13:10:21 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40339: drm/amdgpu: fix nullptr err of vm_handle_moved

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

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

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

drm/amdgpu: fix nullptr err of vm_handle_moved

If a amdgpu_bo_va is fpriv->prt_va, the bo of this one is always NULL.
So, such kind of amdgpu_bo_va should be updated separately before
amdgpu_vm_handle_moved.

The Linux kernel CVE team has assigned CVE-2025-40339 to this issue.


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

	Fixed in 6.12.58 with commit 47281febebe337586569aa4c5694a7511063a42e
	Fixed in 6.17.8 with commit 273d1ea12e42e9babb9783837906f3c466f213d3
	Fixed in 6.18 with commit 859958a7faefe5b7742b7b8cdbc170713d4bf158

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-2025-40339
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/amd/amdgpu/amdgpu_amdkfd_gpuvm.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/47281febebe337586569aa4c5694a7511063a42e
	https://git.kernel.org/stable/c/273d1ea12e42e9babb9783837906f3c466f213d3
	https://git.kernel.org/stable/c/859958a7faefe5b7742b7b8cdbc170713d4bf158