CVE-2026-53371 (GCVE-0-2026-53371)
Vulnerability from cvelistv5
Published
2026-07-19 09:10
Modified
2026-07-19 09:10
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2
Version: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2
Version: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/ionic/ionic_ibdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "61df14f306f153bffa2f3c74a94ff5a85c99fa39",
              "status": "affected",
              "version": "2075bbe8ef03914aa2211035eec45d1d3a5c4ff2",
              "versionType": "git"
            },
            {
              "lessThan": "a3e9372203afde2c62576356bb9a17890bc7fd6c",
              "status": "affected",
              "version": "2075bbe8ef03914aa2211035eec45d1d3a5c4ff2",
              "versionType": "git"
            },
            {
              "lessThan": "654a27f25530d052eeedf086e6c3e2d585c203bd",
              "status": "affected",
              "version": "2075bbe8ef03914aa2211035eec45d1d3a5c4ff2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/ionic/ionic_ibdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.30",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: bound node_desc sysfs read with %.64s\n\nnode_desc[64] in struct ib_device is not guaranteed to be NUL-\nterminated. The core IB sysfs handler uses \"%.64s\" for exactly this\nreason (drivers/infiniband/core/sysfs.c:1307), since node_desc_store()\nperforms a raw memcpy of up to IB_DEVICE_NODE_DESC_MAX bytes with no NUL\ntermination:\n\n  memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));\n\nIf exactly 64 bytes are written via the node_desc sysfs file, the array\ncontains no NUL byte. The ionic hca_type_show() handler uses unbounded\n\"%s\" and will read past the end of node_desc into adjacent fields of\nstruct ib_device until it encounters a NUL.\n\nionic supports IB_DEVICE_MODIFY_NODE_DESC, so this is triggerable by\nuserspace.\n\nMatch the core handler and bound the format specifier."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T09:10:31.706Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd"
        }
      ],
      "title": "RDMA/ionic: bound node_desc sysfs read with %.64s",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53371",
    "datePublished": "2026-07-19T09:10:31.706Z",
    "dateReserved": "2026-06-09T07:44:35.401Z",
    "dateUpdated": "2026-07-19T09:10:31.706Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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