RDMA/ionic: bound node_desc sysfs read with %.64s

{
  "id": "c98fb08d8abceeeb8b208a9cf0ce1194147ab00d7d54ef6f1a73091e27485f0f",
  "url": "https://osv.dev/vulnerability/CVE-2026-53371",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RDMA/ionic: bound node_desc sysfs read with %.64s",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: RDMA/ionic: bound node_desc sysfs read with %.64s node_desc[64] in struct ib_device is not guaranteed to be NUL- terminated. The core IB sysfs handler uses \"%.64s\" for exactly this reason (drivers/infiniband/core/sysfs.c:1307), since node_desc_store() performs a raw memcpy of up to IB_DEVICE_NODE_DESC_MAX bytes with no NUL termination: memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX)); If exactly 64 bytes are written via the node_desc sysfs file, the array contains no NUL byte. The ionic hca_type_show() handler uses unbounded \"%s\" and will read past the end of node_desc into adjacent fields of struct ib_device until it encounters a NUL. ionic supports IB_DEVICE_MODIFY_NODE_DESC, so this is triggerable by userspace. Match the core handler and bound the format specifier.",
    "evidence": "osv:CVE-2026-53371",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.30",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-53371",
      "aliases": [
        "CVE-2026-53371"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2075bbe8ef03914aa2211035eec45d1d3a5c4ff2"
                },
                {
                  "fixed": "61df14f306f153bffa2f3c74a94ff5a85c99fa39"
                },
                {
                  "fixed": "a3e9372203afde2c62576356bb9a17890bc7fd6c"
                },
                {
                  "fixed": "654a27f25530d052eeedf086e6c3e2d585c203bd"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53371.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.30"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53371.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:47.898036005Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39",
        "https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd",
        "https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53371.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53371",
        "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/2026/53xxx/CVE-2026-53371.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53371",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 515865,
  "published_at": "2026-07-19T09:10:31.706+00:00"
}