FKIE_CVE-2024-39291

Vulnerability from fkie_nvd - Published: 2024-06-24 14:15 - Updated: 2025-05-30 19:31
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19bd9537b6bc1c882df25206c15917214d8e9460Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acce6479e30f73ab0872e93a75aed1fb791d04ecPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1b6a016dfa45cedc080d36fa5d6f22237d80e8bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/19bd9537b6bc1c882df25206c15917214d8e9460Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acce6479e30f73ab0872e93a75aed1fb791d04ecPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f1b6a016dfa45cedc080d36fa5d6f22237d80e8bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.10
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3781A223-DB26-4813-92E3-3EF7B545A0E8",
              "versionEndExcluding": "6.6.33",
              "versionStartIncluding": "6.5",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix buffer size in gfx_v9_4_3_init_ cp_compute_microcode() and rlc_microcode()\n\nThe function gfx_v9_4_3_init_microcode in gfx_v9_4_3.c was generating\nabout potential truncation of output when using the snprintf function.\nThe issue was due to the size of the buffer \u0027ucode_prefix\u0027 being too\nsmall to accommodate the maximum possible length of the string being\nwritten into it.\n\nThe string being written is \"amdgpu/%s_mec.bin\" or \"amdgpu/%s_rlc.bin\",\nwhere %s is replaced by the value of \u0027chip_name\u0027. The length of this\nstring without the %s is 16 characters. The warning message indicated\nthat \u0027chip_name\u0027 could be up to 29 characters long, resulting in a total\nof 45 characters, which exceeds the buffer size of 30 characters.\n\nTo resolve this issue, the size of the \u0027ucode_prefix\u0027 buffer has been\nreduced from 30 to 15. This ensures that the maximum possible length of\nthe string being written into the buffer will not exceed its size, thus\npreventing potential buffer overflow and truncation issues.\n\nFixes the below with gcc W=1:\ndrivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c: In function \u2018gfx_v9_4_3_early_init\u2019:\ndrivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:379:52: warning: \u2018%s\u2019 directive output may be truncated writing up to 29 bytes into a region of size 23 [-Wformat-truncation=]\n  379 |         snprintf(fw_name, sizeof(fw_name), \"amdgpu/%s_rlc.bin\", chip_name);\n      |                                                    ^~\n......\n  439 |         r = gfx_v9_4_3_init_rlc_microcode(adev, ucode_prefix);\n      |                                                 ~~~~~~~~~~~~\ndrivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:379:9: note: \u2018snprintf\u2019 output between 16 and 45 bytes into a destination of size 30\n  379 |         snprintf(fw_name, sizeof(fw_name), \"amdgpu/%s_rlc.bin\", chip_name);\n      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\ndrivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:413:52: warning: \u2018%s\u2019 directive output may be truncated writing up to 29 bytes into a region of size 23 [-Wformat-truncation=]\n  413 |         snprintf(fw_name, sizeof(fw_name), \"amdgpu/%s_mec.bin\", chip_name);\n      |                                                    ^~\n......\n  443 |         r = gfx_v9_4_3_init_cp_compute_microcode(adev, ucode_prefix);\n      |                                                        ~~~~~~~~~~~~\ndrivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:413:9: note: \u2018snprintf\u2019 output between 16 and 45 bytes into a destination of size 30\n  413 |         snprintf(fw_name, sizeof(fw_name), \"amdgpu/%s_mec.bin\", chip_name);\n      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/amdgpu: corrigi\u00f3 el tama\u00f1o del b\u00fafer en gfx_v9_4_3_init_ cp_compute_microcode() y rlc_microcode() La funci\u00f3n gfx_v9_4_3_init_microcode en gfx_v9_4_3.c generaba un posible truncamiento de la salida al usar la funci\u00f3n snprintf. El problema se deb\u00eda a que el tama\u00f1o del b\u00fafer \u0027ucode_prefix\u0027 era demasiado peque\u00f1o para acomodar la longitud m\u00e1xima posible de la cadena que se estaba escribiendo en \u00e9l. La cadena que se est\u00e1 escribiendo es \"amdgpu/%s_mec.bin\" o \"amdgpu/%s_rlc.bin\", donde %s se reemplaza por el valor de \u0027chip_name\u0027. La longitud de esta cadena sin %s es de 16 caracteres. El mensaje de advertencia indicaba que \u0027chip_name\u0027 pod\u00eda tener hasta 29 caracteres, lo que daba como resultado un total de 45 caracteres, lo que supera el tama\u00f1o del b\u00fafer de 30 caracteres. Para resolver este problema, el tama\u00f1o del b\u00fafer \u0027ucode_prefix\u0027 se ha reducido de 30 a 15. Esto garantiza que la longitud m\u00e1xima posible de la cadena que se escribe en el b\u00fafer no exceder\u00e1 su tama\u00f1o, evitando as\u00ed posibles problemas de desbordamiento y truncamiento del b\u00fafer. . Corrige lo siguiente con gcc W=1: drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c: En funci\u00f3n \u0027gfx_v9_4_3_early_init\u0027: drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:379:52: advertencia: \u0027 La salida de la directiva de %s puede truncarse escribiendo hasta 29 bytes en una regi\u00f3n de tama\u00f1o 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: nota: \u0027snprintf\u0027 genera entre 16 y 45 bytes en un destino de tama\u00f1o 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: advertencia: la salida de la directiva \u0027%s\u0027 puede truncarse escribiendo hasta 29 bytes en una regi\u00f3n de tama\u00f1o 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: nota: \u0027snprintf\u0027 genera entre 16 y 45 bytes en un destino de tama\u00f1o 30 413 | snprintf(fw_name, sizeof(fw_name), \"amdgpu/%s_mec.bin\", chip_name); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~"
    }
  ],
  "id": "CVE-2024-39291",
  "lastModified": "2025-05-30T19:31:00.777",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-06-24T14:15:12.863",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/19bd9537b6bc1c882df25206c15917214d8e9460"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/acce6479e30f73ab0872e93a75aed1fb791d04ec"
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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