FKIE_CVE-2024-56616

Vulnerability from fkie_nvd - Published: 2024-12-27 15:15 - Updated: 2025-11-03 21:18
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/dp_mst: Fix MST sideband message body length check Fix the MST sideband message body length check, which must be at least 1 byte accounting for the message body CRC (aka message data CRC) at the end of the message. This fixes a case where an MST branch device returns a header with a correct header CRC (indicating a correctly received body length), with the body length being incorrectly set to 0. This will later lead to a memory corruption in drm_dp_sideband_append_payload() and the following errors in dmesg: UBSAN: array-index-out-of-bounds in drivers/gpu/drm/display/drm_dp_mst_topology.c:786:25 index -1 is out of range for type 'u8 [48]' Call Trace: drm_dp_sideband_append_payload+0x33d/0x350 [drm_display_helper] drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper] drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper] memcpy: detected field-spanning write (size 18446744073709551615) of single field "&msg->msg[msg->curlen]" at drivers/gpu/drm/display/drm_dp_mst_topology.c:791 (size 256) Call Trace: drm_dp_sideband_append_payload+0x324/0x350 [drm_display_helper] drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper] drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/109f91d8b9335b0f3714ef9920eae5a8b21d56afPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1fc1f32c4a3421b9d803f18ec3ef49db2fb5d5efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70e7166612f4e6da8d7d0305c47c465d88d037e5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/780fa184d4dc38ad6c4fded345ab8f9be7a63e96Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd2fccac61b40eaf08d9546acc9fef958bfe4763Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c58947a8d4a500902597ee1dbadf0518d7ff8801Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.13
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp_mst: Fix MST sideband message body length check\n\nFix the MST sideband message body length check, which must be at least 1\nbyte accounting for the message body CRC (aka message data CRC) at the\nend of the message.\n\nThis fixes a case where an MST branch device returns a header with a\ncorrect header CRC (indicating a correctly received body length), with\nthe body length being incorrectly set to 0. This will later lead to a\nmemory corruption in drm_dp_sideband_append_payload() and the following\nerrors in dmesg:\n\n   UBSAN: array-index-out-of-bounds in drivers/gpu/drm/display/drm_dp_mst_topology.c:786:25\n   index -1 is out of range for type \u0027u8 [48]\u0027\n   Call Trace:\n    drm_dp_sideband_append_payload+0x33d/0x350 [drm_display_helper]\n    drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper]\n    drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper]\n\n   memcpy: detected field-spanning write (size 18446744073709551615) of single field \"\u0026msg-\u003emsg[msg-\u003ecurlen]\" at drivers/gpu/drm/display/drm_dp_mst_topology.c:791 (size 256)\n   Call Trace:\n    drm_dp_sideband_append_payload+0x324/0x350 [drm_display_helper]\n    drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper]\n    drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/dp_mst: Corregir la comprobaci\u00f3n de longitud del cuerpo del mensaje de banda lateral MST Corrige la comprobaci\u00f3n de longitud del cuerpo del mensaje de banda lateral MST, que debe ser de al menos 1 byte teniendo en cuenta el CRC del cuerpo del mensaje (tambi\u00e9n conocido como CRC de los datos del mensaje) al final del mensaje. Esto corrige un caso en el que un dispositivo de rama MST devuelve un encabezado con un CRC de encabezado correcto (que indica una longitud de cuerpo recibida correctamente), con la longitud del cuerpo configurada incorrectamente en 0. Esto luego provocar\u00e1 una corrupci\u00f3n de memoria en drm_dp_sideband_append_payload() y los siguientes errores en dmesg: UBSAN: array-index-out-of-bounds en drivers/gpu/drm/display/drm_dp_mst_topology.c:786:25 index -1 is out of range for type \u0027u8 [48]\u0027 Seguimiento de llamadas: drm_dp_sideband_append_payload+0x33d/0x350 [drm_display_helper] drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper] drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper] memcpy: se detect\u00f3 una escritura que abarca el campo (tama\u00f1o 18446744073709551615) de un solo campo \"\u0026amp;msg-\u0026gt;msg[msg-\u0026gt;curlen]\" en drivers/gpu/drm/display/drm_dp_mst_topology.c:791 (tama\u00f1o 256) Seguimiento de llamadas: drm_dp_sideband_append_payload+0x324/0x350 [drm_display_helper] drm_dp_get_one_sb_msg+0x3ce/0x5f0 [drm_display_helper] drm_dp_mst_hpd_irq_handle_event+0xc8/0x1580 [drm_display_helper]"
    }
  ],
  "id": "CVE-2024-56616",
  "lastModified": "2025-11-03T21:18:08.850",
  "metrics": {
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-12-27T15:15:21.120",
  "references": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-129"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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