CVE-2026-43444: drm/amdkfd: Unreserve bo if queue update failed

CVE-2026-43444: drm/amdkfd: Unreserve bo if queue update failed

[Greg Kroah-Hartman]

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

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

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

drm/amdkfd: Unreserve bo if queue update failed

Error handling path should unreserve bo then return failed.

(cherry picked from commit c24afed7de9ecce341825d8ab55a43a254348b33)

The Linux kernel CVE team has assigned CVE-2026-43444 to this issue.


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

	Issue introduced in 6.12 with commit 305cd109b761202d71f2f655ea369fe889ba1d01 and fixed in 6.12.78 with commit 781110700ada22168fbb490dd61432d23a17a5b4
	Issue introduced in 6.12 with commit 305cd109b761202d71f2f655ea369fe889ba1d01 and fixed in 6.18.19 with commit 529c985da1b277b36dc99aad660f96dc70f3c467
	Issue introduced in 6.12 with commit 305cd109b761202d71f2f655ea369fe889ba1d01 and fixed in 6.19.9 with commit b2b7742c465c8e3b36dc325a48abb4b9f2aaa38b
	Issue introduced in 6.12 with commit 305cd109b761202d71f2f655ea369fe889ba1d01 and fixed in 7.0 with commit 2ce75a0b7e1bfddbcb9bc8aeb2e5e7fa99971acf

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-2026-43444
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/amdkfd/kfd_process_queue_manager.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/781110700ada22168fbb490dd61432d23a17a5b4
	https://git.kernel.org/stable/c/529c985da1b277b36dc99aad660f96dc70f3c467
	https://git.kernel.org/stable/c/b2b7742c465c8e3b36dc325a48abb4b9f2aaa38b
	https://git.kernel.org/stable/c/2ce75a0b7e1bfddbcb9bc8aeb2e5e7fa99971acf