FKIE_CVE-2024-46710

Vulnerability from fkie_nvd - Published: 2024-09-13 07:15 - Updated: 2025-11-03 23:15
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Prevent unmapping active read buffers The kms paths keep a persistent map active to read and compare the cursor buffer. These maps can race with each other in simple scenario where: a) buffer "a" mapped for update b) buffer "a" mapped for compare c) do the compare d) unmap "a" for compare e) update the cursor f) unmap "a" for update At step "e" the buffer has been unmapped and the read contents is bogus. Prevent unmapping of active read buffers by simply keeping a count of how many paths have currently active maps and unmap only when the count reaches 0.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0851b1ec650adadcaa23ec96daad95a55bf966f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58a3714db4d9dcaeb9fc4905141e17b9f536c0a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aba07b9a0587f50e5d3346eaa19019cf3f86c0eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5228d158e4c0b1663b3983044913c15c3d0135ePatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Prevent unmapping active read buffers\n\nThe kms paths keep a persistent map active to read and compare the cursor\nbuffer. These maps can race with each other in simple scenario where:\na) buffer \"a\" mapped for update\nb) buffer \"a\" mapped for compare\nc) do the compare\nd) unmap \"a\" for compare\ne) update the cursor\nf) unmap \"a\" for update\nAt step \"e\" the buffer has been unmapped and the read contents is bogus.\n\nPrevent unmapping of active read buffers by simply keeping a count of\nhow many paths have currently active maps and unmap only when the count\nreaches 0."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/vmwgfx: evitar la desasignaci\u00f3n de b\u00faferes de lectura activos Las rutas kms mantienen activo un mapa persistente para leer y comparar el b\u00fafer del cursor. Estos mapas pueden competir entre s\u00ed en un escenario simple donde: a) b\u00fafer \"a\" mapeado para actualizaci\u00f3n b) b\u00fafer \"a\" mapeado para comparaci\u00f3n c) hacer la comparaci\u00f3n d) desasignar \"a\" para comparaci\u00f3n e) actualizar el cursor f) desasignar \"a\" para actualizaci\u00f3n En el paso \"e\", el b\u00fafer ha sido desasignado y el contenido de lectura es falso. Evite la desasignaci\u00f3n de b\u00faferes de lectura activos simplemente llevando un recuento de cu\u00e1ntas rutas tienen mapas activos actualmente y desasign\u00e1ndolos solo cuando el recuento llegue a 0."
    }
  ],
  "id": "CVE-2024-46710",
  "lastModified": "2025-11-03T23:15:54.947",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-09-13T07:15:05.880",
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}


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