CVE-2025-21956

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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

drm/amd/display: Assign normalized_pix_clk when color depth = 14

[WHY & HOW] A warning message "WARNING: CPU: 4 PID: 459 at ... /dc_resource.c:3397 calculate_phy_pix_clks+0xef/0x100 [amdgpu]" occurs because the display_color_depth == COLOR_DEPTH_141414 is not handled. This is observed in Radeon RX 6600 XT.

It is fixed by assigning pix_clk * (14 * 3) / 24 - same as the rests.

Also fixes the indentation in get_norm_pix_clk.

(cherry picked from commit 274a87eb389f58eddcbc5659ab0b180b37e92775)

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < cca3ab74f90176099b6392e8e894b52b27b3d080; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 0174a2e5770efee9dbd4b58963ed4d939298ff5e; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 0c0016712e5dc23ce4a7e673cbebc24a535d8c8a; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < dc831b38680c47d07e425871a9852109183895cf; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < a8f77e1658d78e4a8bb227a83bcee67de97f7634; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 04f90b505ad3a6eed474bbaa03167095fef5203a; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 27df30106690969f7d63604f0d49ed8e9bffa2cb; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 79e31396fdd7037c503e6add15af7cb00633ea92
LinuxLinux4.15

References

Timeline

Published
Apr 1, 2025
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2025-21956: Medium severity, CVSS 5.5 | Vulnix