accel/qaic: tighten bounds checking in decode_message()

{
  "id": "c26383f0aa74a2e592840b7f2c0aba7fe718020d59d884da93a443c74e1d2362",
  "url": "https://osv.dev/vulnerability/CVE-2023-53493",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "accel/qaic: tighten bounds checking in decode_message()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: accel/qaic: tighten bounds checking in decode_message() Copy the bounds checking from encode_message() to decode_message(). This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later. if (msg_hdr_len < sizeof(*trans_hdr)) Ensure that we have enough space to read the next header from the msg->data. if (msg_len > msg_hdr_len - sizeof(*trans_hdr)) return -EINVAL; Check that the trans_hdr->len is not below the minimum size: if (hdr_len < sizeof(*trans_hdr)) This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do. memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr)); And finally, use size_add() to prevent an integer overflow: if (size_add(msg_len, hdr_len) > msg_hdr_len)",
    "evidence": "osv:CVE-2023-53493",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.4.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-53493",
      "aliases": [
        "CVE-2023-53493"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "129776ac2e38231fa9c02ce20e116c99de291666"
                },
                {
                  "fixed": "57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd"
                },
                {
                  "fixed": "51b56382ed2a2b03347372272362b3baa623ed1e"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53493.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.4.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53493.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.533179978Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e",
        "https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53493.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53493",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53493.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53493",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521043,
  "published_at": "2025-10-01T11:45:44.939+00:00"
}