{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b"
            },
            {
              "fixed": "6bb73845d1855ceaf50e397175e5979a7bdf69bc"
            },
            {
              "fixed": "ee6d9b6e51626f259c6f0e38d94f91be4fd14754"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53171.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ethosu: fix arithmetic issues in dma_length()\n\ndma_length() derives DMA region usage from command stream values and\nupdates region_size[]:\n\n    len = ((len + stride[0]) * size0 + stride[1]) * size1\n    region_size[region] = max(..., len + dma-\u003eoffset)\n\nSeveral arithmetic issues can corrupt the derived region size:\n\n- signed stride values may underflow when added to len\n- intermediate multiplications may overflow\n- len + dma-\u003eoffset may overflow during region_size updates\n- dma_length() error returns were not validated by the caller\n\nregion_size[] is later used by ethosu_job.c to validate command stream\naccesses against GEM buffer sizes. Arithmetic wraparound can therefore\nunder-report region usage and bypass the bounds validation.\n\nFix by validating signed additions, using overflow helpers for\nmultiplications and offset updates, and propagating dma_length()\nfailures to the caller.",
  "id": "CVE-2026-53171",
  "modified": "2026-07-08T05:36:00.415168585Z",
  "published": "2026-06-25T08:38:49.392Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bb73845d1855ceaf50e397175e5979a7bdf69bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee6d9b6e51626f259c6f0e38d94f91be4fd14754"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53171.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53171"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "accel/ethosu: fix arithmetic issues in dma_length()"
}