linux-cve-announce - CVE-2022-50037: drm/i915/ttm: don't leak the ccs state

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Message-ID: <2025061841-CVE-2022-50037-ca44@gregkh>
Date: Wed, 18 Jun 2025 13:01:42 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50037: drm/i915/ttm: don't leak the ccs state

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

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

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

drm/i915/ttm: don't leak the ccs state

The kernel only manages the ccs state with lmem-only objects, however
the kernel should still take care not to leak the CCS state from the
previous user.

(cherry picked from commit 353819d85f87be46aeb9c1dd929d445a006fc6ec)

The Linux kernel CVE team has assigned CVE-2022-50037 to this issue.


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

	Issue introduced in 5.19 with commit 48760ffe923aeb2cc73865ea36b3509718d102e3 and fixed in 5.19.4 with commit b431cffb4883b9e90d48f0c408674c50fef428a5
	Issue introduced in 5.19 with commit 48760ffe923aeb2cc73865ea36b3509718d102e3 and fixed in 6.0 with commit 232d150fa15606e96c0e01e5c7a2d4e03f621787

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-2022-50037
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/i915/gt/intel_migrate.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/b431cffb4883b9e90d48f0c408674c50fef428a5
	https://git.kernel.org/stable/c/232d150fa15606e96c0e01e5c7a2d4e03f621787