GHSA-CQCH-VJQ7-8XRC

Vulnerability from github – Published: 2026-07-19 15:30 – Updated: 2026-07-20 15:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: Prefer NLA_NUL_STRING

These attributes are evaluated as c-string (passed to strcmp), but NLA_STRING doesn't check for the presence of a \0 terminator.

Either this needs to switch to nla_strcmp() and needs to adjust printf fmt specifier to not use plain %s, or this needs to use NLA_NUL_STRING.

As the code has been this way for long time, it seems to me that userspace does include the terminating nul, even tough its not enforced so far, and thus NLA_NUL_STRING use is the simpler solution.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-63860"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T15:16:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Prefer NLA_NUL_STRING\n\nThese attributes are evaluated as c-string (passed to strcmp), but\nNLA_STRING doesn\u0027t check for the presence of a \\0 terminator.\n\nEither this needs to switch to nla_strcmp() and needs to adjust printf fmt\nspecifier to not use plain %s, or this needs to use NLA_NUL_STRING.\n\nAs the code has been this way for long time, it seems to me that userspace\ndoes include the terminating nul, even tough its not enforced so far, and\nthus NLA_NUL_STRING use is the simpler solution.",
  "id": "GHSA-cqch-vjq7-8xrc",
  "modified": "2026-07-20T15:31:48Z",
  "published": "2026-07-19T15:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63860"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/137b5918931d4d05aa8ea8d3adf67f7224eef63c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5877c043398d5fa0e93919a3d837e5cd7a98a961"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ed3d14fc45d3da6025e7fe4a6a09066856698e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87111356d58d86edb221ba144d261ed83a5b8bbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abda65bdd13084c771842adaac1f652d0660dd82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c26a0052cceed4c4d380ee5808b699f937fb58d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f2c7b39dde2e61df8157066969cc2a408cd3dcd9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcd07d3b8ee7a39b344d73aed69c1a68cd9eacdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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