CVE-2024-39291

/// Technical description

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

drm/amdgpu: Fix buffer size in gfx_v9_4_3_init_ cp_compute_microcode() and rlc_microcode()

The function gfx_v9_4_3_init_microcode in gfx_v9_4_3.c was generating

about potential truncation of output when using the snprintf function.

The issue was due to the size of the buffer 'ucode_prefix' being too

small to accommodate the maximum possible length of the string being

written into it.

The string being written is "amdgpu/%s_mec.bin" or "amdgpu/%s_rlc.bin",

where %s is replaced by the value of 'chip_name'. The length of this

string without the %s is 16 characters. The warning message indicated

that 'chip_name' could be up to 29 characters long, resulting in a total

of 45 characters, which exceeds the buffer size of 30 characters.

To resolve this issue, the size of the 'ucode_prefix' buffer has been

reduced from 30 to 15. This ensures that the maximum possible length of

the string being written into the buffer will not

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References