CVE-2026-80908: drm/amdgpu: Reject UVD message with dimensions above 4096

CVE-2026-80908: drm/amdgpu: Reject UVD message with dimensions above 4096

[Greg Kroah-Hartman]

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

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

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

drm/amdgpu: Reject UVD message with dimensions above 4096

Fixes potential overflow in DPB size calculations.

(cherry picked from commit 05e1387d151f71569fbe122d2c89f9db0c21dc10)

The Linux kernel CVE team has assigned CVE-2026-80908 to this issue.


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

	Fixed in 5.10.266 with commit 8bae80eaed00e7ae28412a3cdf590f4beca72294
	Fixed in 5.15.217 with commit 9adc5e25f31d7ee7dfc18814499b6e3a6d402904
	Fixed in 6.1.184 with commit 382bef781ff441ce8055bdada57b8c291dc0fd30
	Fixed in 6.6.153 with commit 8435d41afcf2bc31ecee213ef651c12bd1a16d38
	Fixed in 6.12.105 with commit f7af372d3b892b95dd3cd1c6acf29daa39ba076d
	Fixed in 6.18.46 with commit 339deb76ee4859ea973e435c9a9a4a4fefc29338
	Fixed in 7.1.10 with commit 17fbb996c05f2190e0fa20927ca0b9804d481b02
	Fixed in 7.2 with commit 8c9aebcdd9f46f7a14b98d6ab18574b7a48fbb08

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-2026-80908
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_uvd.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/8bae80eaed00e7ae28412a3cdf590f4beca72294
	https://git.kernel.org/stable/c/9adc5e25f31d7ee7dfc18814499b6e3a6d402904
	https://git.kernel.org/stable/c/382bef781ff441ce8055bdada57b8c291dc0fd30
	https://git.kernel.org/stable/c/8435d41afcf2bc31ecee213ef651c12bd1a16d38
	https://git.kernel.org/stable/c/f7af372d3b892b95dd3cd1c6acf29daa39ba076d
	https://git.kernel.org/stable/c/339deb76ee4859ea973e435c9a9a4a4fefc29338
	https://git.kernel.org/stable/c/17fbb996c05f2190e0fa20927ca0b9804d481b02
	https://git.kernel.org/stable/c/8c9aebcdd9f46f7a14b98d6ab18574b7a48fbb08