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GHSA-WCP7-J68J-J6MV

Vulnerability from github – Published: 2026-07-19 09:31 – Updated: 2026-07-19 09:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53371"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T09:17:02Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-wcp7-j68j-j6mv",
  "modified": "2026-07-19T09:31:36Z",
  "published": "2026-07-19T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53371"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53371 (GCVE-0-2026-53371)

Vulnerability from cvelistv5 – Published: 2026-07-19 09:10 – Updated: 2026-07-19 09:10

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.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/61df14f306f153bff…
https://git.kernel.org/stable/c/a3e9372203afde2c6…
https://git.kernel.org/stable/c/654a27f25530d052e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 , < 61df14f306f153bffa2f3c74a94ff5a85c99fa39 (git) Affected: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 , < a3e9372203afde2c62576356bb9a17890bc7fd6c (git) Affected: 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 , < 654a27f25530d052eeedf086e6c3e2d585c203bd (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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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": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.30",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
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                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      "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",
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd"
        }
      ],
      "title": "RDMA/ionic: bound node_desc sysfs read with %.64s",
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  "cveMetadata": {
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    "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"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-WCP7-J68J-J6MV

CVE-2026-53371 (GCVE-0-2026-53371)

Tags

Sightings

Nomenclature