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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-46276 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix zero-size GDS range init on RDNA4 RDNA4 (GFX 12) hardware removes the GDS, GWS, and OA on-chip memory resources. The gfx_v12_0 initialisation code correctly leaves adev->gds.gds_size, adev->gds.gws_size, and adev->gds.oa_size at zero to reflect this. amdgpu_ttm_init() unconditionally calls amdgpu_ttm_init_on_chip() for each of these resources regardless of size. When the size is zero, amdgpu_ttm_init_on_chip() forwards the call to ttm_range_man_init(), which calls drm_mm_init(mm, 0, 0). drm_mm_init() immediately fires DRM_MM_BUG_ON(start + size <= start) -- trivially true when size is zero -- crashing the kernel during modprobe of amdgpu on an RX 9070 XT. Guard against this by returning 0 early from amdgpu_ttm_init_on_chip() when size_in_page is zero. This skips TTM resource manager registration for hardware resources that are absent, without affecting any other GPU type. DRM_MM_BUG_ON() only asserts if CONFIG_DRM_DEBUG_MM is enabled in the kernel config. This is apparently rarely enabled as these chips have been in the market for over a year and this issue was only reported now. Oops-Analysis: http://oops.fenrus.org/reports/bugzilla.korg/221376/report.html (cherry picked from commit 5719ce5865279cad4fd5f01011fe037168503f2d)


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/095a8b0ad3c3b5cdc3850d961adb8a8f735220bb kernel.org Patch 
https://git.kernel.org/stable/c/0e21db1a77967bc15df662efdca8ea8a61d124ea kernel.org Patch 
https://git.kernel.org/stable/c/1f5d33e7b0a9a2a140f46e22fb52eede323c5946 kernel.org Patch 
https://git.kernel.org/stable/c/30c000a49094ec568c9b51b7421f7a4a3f0b0298 kernel.org Patch 
https://git.kernel.org/stable/c/36f9602fb22ede69fcc8b422be0cf8105bf655ad kernel.org Patch 
https://git.kernel.org/stable/c/3e26c76891ab99fa173e9c501119fbb5c9f4600f kernel.org Patch 
https://git.kernel.org/stable/c/9bc925759c05feae7dfa9570e77131d54729c8ea kernel.org Patch 
https://git.kernel.org/stable/c/be0376affcafa0bbb371bb501579a825eae32281 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-46276
NVD Published Date:
06/08/2026
NVD Last Modified:
07/23/2026
Source:
kernel.org