ghsa-rjhh-hgmx-6v66
Vulnerability from github
Published
2025-05-09 09:33
Modified
2025-05-09 09:33
Details

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

arm64: mops: Do not dereference src reg for a set operation

The source register is not used for SET and reading it can result in a UBSAN out-of-bounds array access error, specifically when the MOPS exception is taken from a SET sequence with XZR (reg 31) as the source. Architecturally this is the only case where a src/dst/size field in the ESR can be reported as 31.

Prior to 2de451a329cf662b the code in do_el0_mops() was benign as the use of pt_regs_read_reg() prevented the out-of-bounds access.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37846"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-09T07:16:05Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mops: Do not dereference src reg for a set operation\n\nThe source register is not used for SET* and reading it can result in\na UBSAN out-of-bounds array access error, specifically when the MOPS\nexception is taken from a SET* sequence with XZR (reg 31) as the\nsource. Architecturally this is the only case where a src/dst/size\nfield in the ESR can be reported as 31.\n\nPrior to 2de451a329cf662b the code in do_el0_mops() was benign as the\nuse of pt_regs_read_reg() prevented the out-of-bounds access.",
  "id": "GHSA-rjhh-hgmx-6v66",
  "modified": "2025-05-09T09:33:19Z",
  "published": "2025-05-09T09:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37846"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43267d934eacff6c70e15545d804ebbcab8a0bf5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f6022a74147675124b781fdc056b291850e7786"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eec737e17e5567e08148550a7f1d94d495b9fb17"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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