CVE-2024-49895 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation

This commit addresses a potential index out of bounds issue in the cm3_helper_translate_curve_to_degamma_hw_format function in the DCN30 color management module. The issue could occur when the index ‘i’ exceeds the number of transfer function points (TRANSFER_FUNC_POINTS).

The fix adds a check to ensure ‘i’ is within bounds before accessing the transfer function points. If ‘i’ is out of bounds the function returns false to indicate an error.

Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:338 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow ‘output_tf->tf_pts.red’ 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:339 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow ‘output_tf->tf_pts.green’ 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:340 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow ‘output_tf->tf_pts.blue’ 1025 <= s32max

CVSS Vector

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

Reference

https://git.kernel.org/stable/c/ad89f83343a501890cf082c8a584e96b59fe4015 https://git.kernel.org/stable/c/de6ee4f9e6b1c36b4fdc7c345c1a6de9e246093e https://git.kernel.org/stable/c/f3ccd855b4395ce65f10dd37847167f52e122b70 https://git.kernel.org/stable/c/0d38a0751143afc03faef02d55d31f70374ff843 https://git.kernel.org/stable/c/f5c3d306de91a4b69cfe3eedb72b42d452593e42 https://git.kernel.org/stable/c/c4fdc2d6fea129684b82bab90bb52fbace494a58 https://git.kernel.org/stable/c/bc50b614d59990747dd5aeced9ec22f9258991ff

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8