FKIE_CVE-2024-46852

Vulnerability from fkie_nvd - Published: 2024-09-27 13:15 - Updated: 2025-11-03 23:16
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: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps: Don't track CMA dma-buf pages under RssFile") it was possible to obtain a mapping larger than the buffer size via mremap and bypass the overflow check in dma_buf_mmap_internal. When using such a mapping to attempt to fault past the end of the buffer, the CMA heap fault handler also checks the fault offset against the buffer size, but gets the boundary wrong by 1. Fix the boundary check so that we don't read off the end of the pages array and insert an arbitrary page in the mapping.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79cce5e81d20fa9ad553be439d665ac3302d3c95
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbffPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620eaPatch
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 *
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
linux linux_kernel 6.11
linux linux_kernel 6.11
To clipboard 

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  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf: heaps: Fix off-by-one in CMA heap fault handler\n\nUntil VM_DONTEXPAND was added in commit 1c1914d6e8c6 (\"dma-buf: heaps:\nDon\u0027t track CMA dma-buf pages under RssFile\") it was possible to obtain\na mapping larger than the buffer size via mremap and bypass the overflow\ncheck in dma_buf_mmap_internal. When using such a mapping to attempt to\nfault past the end of the buffer, the CMA heap fault handler also checks\nthe fault offset against the buffer size, but gets the boundary wrong by\n1. Fix the boundary check so that we don\u0027t read off the end of the pages\narray and insert an arbitrary page in the mapping."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Hasta que se agreg\u00f3 VM_DONTEXPAND en el commit 1c1914d6e8c6 (\"dma-buf: heaps: Don\u0027t track CMA dma-buf pages under RssFile\") era posible obtener un mapeo m\u00e1s grande que el tama\u00f1o del buffer a trav\u00e9s de mremap y omitir la verificaci\u00f3n de desbordamiento en dma_buf_mmap_internal. Al usar dicho mapeo para intentar fallar m\u00e1s all\u00e1 del final del b\u00fafer, el manejador de fallas del mont\u00f3n de CMA tambi\u00e9n verifica el desplazamiento de la falla contra el tama\u00f1o del b\u00fafer, pero obtiene el l\u00edmite incorrecto por 1. Corrija la verificaci\u00f3n del l\u00edmite para que no leamos el final de la matriz de p\u00e1ginas e insertemos una p\u00e1gina arbitraria en el mapeo."
    }
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  "id": "CVE-2024-46852",
  "lastModified": "2025-11-03T23:16:08.507",
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          "attackVector": "LOCAL",
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          "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",
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
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  "published": "2024-09-27T13:15:16.917",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.