FKIE_CVE-2026-74647

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-27 13:18
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: misc: fastrpc: Remove buffer from list prior to unmap operation fastrpc_req_munmap_impl() is called to unmap any buffer. The buffer is getting removed from the list after it is unmapped from DSP. This can create potential race conditions if multiple threads invoke unmap concurrently, where one thread may remove the entry from the list while another thread's unmap operation is still ongoing. Fix this by removing the buffer entry from the list before calling the unmap operation. If the unmap fails, the entry is re-added to the list so that userspace can retry the unmap, or alternatively, the buffer will be cleaned up during device release when the DSP process is torn down and all DSP-side mappings are freed along with remaining buffers in the list.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1edb654b2b41baee2ab5cf418baaf6e57dfbd802
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4716c23c206a2f99ca54ebfdd8b5ba9dd0102240
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6102ceb4eab845743ee57acd3863fbd06e93c927
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97273624f7b356eaf8261609a75cfcb8738a165a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99f8de36c84cb9b872157aa6c3578c2480cee4b8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9bf22a7d950cec2d1efeca7f16bb20fcca84c36a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe70329055977fc1e8dc6291318d0dd75470795a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1edb654b2b41baee2ab5cf418baaf6e57dfbd802",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "4716c23c206a2f99ca54ebfdd8b5ba9dd0102240",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "99f8de36c84cb9b872157aa6c3578c2480cee4b8",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "97273624f7b356eaf8261609a75cfcb8738a165a",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "fe70329055977fc1e8dc6291318d0dd75470795a",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "9bf22a7d950cec2d1efeca7f16bb20fcca84c36a",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            },
            {
              "lessThan": "6102ceb4eab845743ee57acd3863fbd06e93c927",
              "status": "affected",
              "version": "2419e55e532de14fdf336e09e453aa2831c73a25",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.267",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Remove buffer from list prior to unmap operation\n\nfastrpc_req_munmap_impl() is called to unmap any buffer. The buffer is\ngetting removed from the list after it is unmapped from DSP. This can\ncreate potential race conditions if multiple threads invoke unmap\nconcurrently, where one thread may remove the entry from the list while\nanother thread\u0027s unmap operation is still ongoing.\n\nFix this by removing the buffer entry from the list before calling the\nunmap operation. If the unmap fails, the entry is re-added to the list\nso that userspace can retry the unmap, or alternatively, the buffer\nwill be cleaned up during device release when the DSP process is torn\ndown and all DSP-side mappings are freed along with remaining buffers\nin the list."
    }
  ],
  "id": "CVE-2026-74647",
  "lastModified": "2026-08-27T13:18:35.540",
  "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-22T16:16:38.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1edb654b2b41baee2ab5cf418baaf6e57dfbd802"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4716c23c206a2f99ca54ebfdd8b5ba9dd0102240"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6102ceb4eab845743ee57acd3863fbd06e93c927"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97273624f7b356eaf8261609a75cfcb8738a165a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/99f8de36c84cb9b872157aa6c3578c2480cee4b8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9bf22a7d950cec2d1efeca7f16bb20fcca84c36a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe70329055977fc1e8dc6291318d0dd75470795a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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