{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b"
            },
            {
              "fixed": "ee7bed779def61ebff1b92b0e851f412176fa416"
            },
            {
              "fixed": "00f547e0dfecf83014fb32bcba587c6b684c1362"
            }
          ],
          "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-2026-53172.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ethosu: fix IFM region index out-of-bounds in command stream parser\n\nNPU_SET_IFM_REGION extracts the region index with param \u0026 0x7f, giving\na maximum value of 127. However region_size[] and output_region[] in\nstruct ethosu_validated_cmdstream_info are both sized to\nNPU_BASEP_REGION_MAX (8), giving valid indices [0..7].\n\nEvery other region assignment in the same switch uses param \u0026 0x7:\n  NPU_SET_OFM_REGION:  st.ofm.region  = param \u0026 0x7;\n  NPU_SET_IFM2_REGION: st.ifm2.region = param \u0026 0x7;\n  NPU_SET_WEIGHT_REGION: st.weight[0].region = param \u0026 0x7;\n  NPU_SET_SCALE_REGION:  st.scale[0].region  = param \u0026 0x7;\n\nThe 0x7f mask on IFM is inconsistent and appears to be a typo.\n\nfeat_matrix_length() and calc_sizes() use the region index directly\nas an array subscript into the kzalloc'd info struct:\n  info-\u003eregion_size[fm-\u003eregion] = max(...);\n\nA userspace caller supplying NPU_SET_IFM_REGION with param \u003e 7 causes\na write up to 127*8 = 1016 bytes past the start of region_size[],\ncorrupting adjacent kernel heap data.\n\nFix by applying the same \u0026 0x7 mask used by all other region\nassignments.",
  "id": "CVE-2026-53172",
  "modified": "2026-07-08T05:39:18.638394185Z",
  "published": "2026-06-25T08:38:50.056Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00f547e0dfecf83014fb32bcba587c6b684c1362"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee7bed779def61ebff1b92b0e851f412176fa416"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53172.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53172"
    },
    {
      "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:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "accel/ethosu: fix IFM region index out-of-bounds in command stream parser"
}