CVE-2026-53159 (GCVE-0-2026-53159)
Vulnerability from cvelistv5
Published
2026-06-25 08:38
Modified
2026-08-05 12:33
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix DMA address corruption due to find_vma misuse fastrpc_get_args() uses find_vma() to look up the VMA for a user-provided pointer and compute a DMA address offset. When the address falls in a gap before the returned VMA, (ptr & PAGE_MASK) - vma->vm_start underflows, corrupting the DMA address sent to the DSP. Replace find_vma() with vma_lookup(), which returns NULL when the address is not contained within any VMA.
References
Impacted products
Vendor Product Version
Linux Linux Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 80f3afd72bd4149c57daf852905476b43bb47647
Version: 954edc466128479872731d06f026d0e71840d153
Version: 5.1.6   ≤
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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      "cpeApplicability": [
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix DMA address corruption due to find_vma misuse\n\nfastrpc_get_args() uses find_vma() to look up the VMA for a user-provided\npointer and compute a DMA address offset. When the address falls in a gap\nbefore the returned VMA, (ptr \u0026 PAGE_MASK) - vma-\u003evm_start underflows,\ncorrupting the DMA address sent to the DSP.\n\nReplace find_vma() with vma_lookup(), which returns NULL when the address\nis not contained within any VMA."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached through local FastRPC misc-device ioctls, especially FASTRPC_IOCTL_INVOKE, not through network packets or adjacent/physical input.\nAC:L - The attacker controls the invoke arguments, DMA-buf fd, length, and user address layout; placing the pointer in a VMA gap is straightforward with mmap/munmap and no race is required.\nPR:L - A caller needs local access to an openable /dev/fastrpc-* device, but the kernel path has no capable() check and FastRPC supports untrusted/unsigned user protection domains on relevant Qualcomm DSP deployments.\nUI:N - The attacker triggers the ioctl path directly and does not need another user to open files, mount anything, or perform an action.\nS:C - The corrupted address is consumed across the host/DSP DMA/IOMMU boundary, so the bug can affect memory resources outside the caller\u2019s intended FastRPC buffer authority.\nC:H - The underflow can make an attacker-controlled DSP invocation read from unintended DMA/IOMMU-visible memory rather than the supplied buffer, which is a plausible high-impact information disclosure primitive.\nI:H - For output or bidirectional buffers, the same corrupted DMA address can direct DSP writes to unintended DMA/IOMMU-visible memory, giving a plausible high-impact memory corruption primitive.\nA:H - Invalid or unintended DMA addresses can trigger IOMMU/DSP faults, hangs, or kernel-facing subsystem failure, producing high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:33:33.871Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d43afc412d439ffca1567e7ca8652be22f272b3b"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d0f47e27c1fa718b29c69aa7c96a2c5161bc2c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/708c17b52c60fe7a57e73b495bdee50f58feb48c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3e26df2e8eb361e6bef096b2fd565476a1f14c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/e69e306a4cccb40a73511350cb280825a556ce3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/53e06f8a3c2b085c31bf1284e2ebcb8036e99625"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ba7b30ddb04646d4d638f4d8c4718a304bbbddd"
        },
        {
          "url": "https://git.kernel.org/stable/c/464c6ad2aa16e1e1df9d559289199356493d1e00"
        }
      ],
      "title": "misc: fastrpc: fix DMA address corruption due to find_vma misuse",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53159",
    "datePublished": "2026-06-25T08:38:41.482Z",
    "dateReserved": "2026-06-09T07:44:35.388Z",
    "dateUpdated": "2026-08-05T12:33:33.871Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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