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CVE-2025-40172

Estado: AplazadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()

Currently, if find_and_map_user_pages() takes a DMA xfer request from the user with a length field set to 0, or in a rare case, the host receives QAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size is equal to the requested transaction size, the function will return 0 before allocating an sgt or setting the fields of the dma_xfer struct. In that case, encode_addr_size_pairs() will try to access the sgt which will lead to a general protection fault.

Leer descripción completaMostrar menos

Return an EINVAL in case the user provides a zero-sized ALP, or the device requests continuation after all of the bytes have been transferred.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:L/PR:L sin UI permite escalada local; fallo de protección causa DoS (general protection fault).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40172",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
              "lessThan": "48b1d42286bfef7628b1d6c8c28d4e456c90f725",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
              "lessThan": "551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
              "lessThan": "1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
              "lessThan": "11f08c30a3e4157305ba692f1d44cca5fc9a8fca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.4.12",
              "lessThan": "6.5",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.114",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-11-12T11:15:47.643",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()\n\nCurrently, if find_and_map_user_pages() takes a DMA xfer request from the\nuser with a length field set to 0, or in a rare case, the host receives\nQAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size\nis equal to the requested transaction size, the function will return 0\nbefore allocating an sgt or setting the fields of the dma_xfer struct.\nIn that case, encode_addr_size_pairs() will try to access the sgt which\nwill lead to a general protection fault.\n\nReturn an EINVAL in case the user provides a zero-sized ALP, or the device\nrequests continuation after all of the bytes have been transferred."
    }
  ],
  "lastModified": "2026-07-30T06:24:15.940",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}