CVE - CVE-2024-39291

CVE-ID
CVE-2024-39291	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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 exceed its size, thus preventing potential buffer overflow and truncation issues. Fixes the below with gcc W=1: drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c: In function ‘gfx_v9_4_3_early_init’: drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:379:52: warning: ‘%s’ directive output may be truncated writing up to 29 bytes into a region of size 23 [-Wformat-truncation=] 379 \| snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_rlc.bin", chip_name); \| ^~ ...... 439 \| r = gfx_v9_4_3_init_rlc_microcode(adev, ucode_prefix); \| ~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:379:9: note: ‘snprintf’ output between 16 and 45 bytes into a destination of size 30 379 \| snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_rlc.bin", chip_name); \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:413:52: warning: ‘%s’ directive output may be truncated writing up to 29 bytes into a region of size 23 [-Wformat-truncation=] 413 \| snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_mec.bin", chip_name); \| ^~ ...... 443 \| r = gfx_v9_4_3_init_cp_compute_microcode(adev, ucode_prefix); \| ~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:413:9: note: ‘snprintf’ output between 16 and 45 bytes into a destination of size 30 413 \| snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_mec.bin", chip_name); \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/19bd9537b6bc1c882df25206c15917214d8e9460 URL:https://git.kernel.org/stable/c/19bd9537b6bc1c882df25206c15917214d8e9460 MISC:https://git.kernel.org/stable/c/acce6479e30f73ab0872e93a75aed1fb791d04ec URL:https://git.kernel.org/stable/c/acce6479e30f73ab0872e93a75aed1fb791d04ec MISC:https://git.kernel.org/stable/c/f1b6a016dfa45cedc080d36fa5d6f22237d80e8b URL:https://git.kernel.org/stable/c/f1b6a016dfa45cedc080d36fa5d6f22237d80e8b
Assigning CNA
kernel.org
Date Record Created
20240621	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240621)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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