GHSA-P4JX-GH49-76WV

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33
VLAI
Details

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

RDMA/mlx5: Fix undefined shift of user RQ WQE size

set_rq_size() computes the RQ WQE size as "1 << rq_wqe_shift" based on the user-provided rq_wqe_shift, which is only checked to be greater than 32, so shifts of 32 are still accepted. A shift of 31 also overflows a signed integer, leading to undefined behavior.

Use check_shl_overflow() to compute the RQ WQE size and reject any invalid values.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-74297"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:29Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix undefined shift of user RQ WQE size\n\nset_rq_size() computes the RQ WQE size as \"1 \u003c\u003c rq_wqe_shift\" based on\nthe user-provided rq_wqe_shift, which is only checked to be greater than\n32, so shifts of 32 are still accepted. A shift of 31 also overflows a\nsigned integer, leading to undefined behavior.\n\nUse check_shl_overflow() to compute the RQ WQE size and reject any\ninvalid values.",
  "id": "GHSA-p4jx-gh49-76wv",
  "modified": "2026-08-17T06:33:37Z",
  "published": "2026-08-15T06:32:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74297"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42f3d2c8c18b92ea33e506a38b64f1a8986c2823"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b87a2497276a72fd63028e7419abf0fb7ed837b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9fff54929cc00849d738faa99f06c32399aeb026"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b732db02a2b04cde393638df19de6251ce62a74e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b746f949c2ac2b041102836095d6d4a2ef21fa75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d881d60223aac8fdc12b227d89c76e131e92a9cd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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