linux-cve-announce - CVE-2025-21989: drm/amd/display: fix missing .is_two_pixels_per

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025040256-CVE-2025-21989-440d@gregkh>
Date: Wed,  2 Apr 2025 13:51:56 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21989: drm/amd/display: fix missing .is_two_pixels_per_container

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

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

drm/amd/display: fix missing .is_two_pixels_per_container

Starting from 6.11, AMDGPU driver, while being loaded with amdgpu.dc=1,
due to lack of .is_two_pixels_per_container function in dce60_tg_funcs,
causes a NULL pointer dereference on PCs with old GPUs, such as R9 280X.

So this fix adds missing .is_two_pixels_per_container to dce60_tg_funcs.

(cherry picked from commit bd4b125eb949785c6f8a53b0494e32795421209d)

The Linux kernel CVE team has assigned CVE-2025-21989 to this issue.


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

	Issue introduced in 6.11 with commit e6a901a00822659181c93c86d8bbc2a17779fddc and fixed in 6.12.20 with commit fefa811e616b5d0b555ed65743e528a0a8a0b377
	Issue introduced in 6.11 with commit e6a901a00822659181c93c86d8bbc2a17779fddc and fixed in 6.13.8 with commit 36d04c9313d8d83ead92242f037099ac73e02120
	Issue introduced in 6.11 with commit e6a901a00822659181c93c86d8bbc2a17779fddc and fixed in 6.14 with commit e204aab79e01bc8ff750645666993ed8b719de57

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-2025-21989
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/display/dc/dce60/dce60_timing_generator.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/fefa811e616b5d0b555ed65743e528a0a8a0b377
	https://git.kernel.org/stable/c/36d04c9313d8d83ead92242f037099ac73e02120
	https://git.kernel.org/stable/c/e204aab79e01bc8ff750645666993ed8b719de57