CVE-2024-49970 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: Implement bounds check for stream encoder creation in DCN401

‘stream_enc_regs’ array is an array of dcn10_stream_enc_registers structures. The array is initialized with four elements corresponding to the four calls to stream_enc_regs() in the array initializer. This means that valid indices for this array are 0 1 2 and 3.

The error message ‘stream_enc_regs’ 4 <= 5 below is indicating that there is an attempt to access this array with an index of 5 which is out of bounds. This could lead to undefined behavior

Here eng_id is used as an index to access the stream_enc_regs array. If eng_id is 5 this would result in an out-of-bounds access on the stream_enc_regs array.

Thus fixing Buffer overflow error in dcn401_stream_encoder_create

Found by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn401/dcn401_resource.c:1209 dcn401_stream_encoder_create() error: buffer overflow ‘stream_enc_regs’ 4 <= 5

CVSS Vector

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

Reference

https://git.kernel.org/stable/c/b219b46ad42df1dea9258788bcfea37181f3ccb2 https://git.kernel.org/stable/c/bdf606810210e8e07a0cdf1af3c467291363b295

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5