GHSA-V6H5-RJWV-4CVJ

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-06 12:30
VLAI?
Details

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

EFI/CPER: don't dump the entire memory region

The current logic at cper_print_fw_err() doesn't check if the error record length is big enough to handle offset. On a bad firmware, if the ofset is above the actual record, length -= offset will underflow, making it dump the entire memory.

The end result can be:

  • the logic taking a lot of time dumping large regions of memory;
  • data disclosure due to the memory dumps;
  • an OOPS, if it tries to dump an unmapped memory region.

Fix it by checking if the section length is too small before doing a hex dump.

[ rjw: Subject tweaks ]

Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-43171"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:35Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nEFI/CPER: don\u0027t dump the entire memory region\n\nThe current logic at cper_print_fw_err() doesn\u0027t check if the\nerror record length is big enough to handle offset. On a bad firmware,\nif the ofset is above the actual record, length -= offset will\nunderflow, making it dump the entire memory.\n\nThe end result can be:\n\n - the logic taking a lot of time dumping large regions of memory;\n - data disclosure due to the memory dumps;\n - an OOPS, if it tries to dump an unmapped memory region.\n\nFix it by checking if the section length is too small before doing\na hex dump.\n\n[ rjw: Subject tweaks ]",
  "id": "GHSA-v6h5-rjwv-4cvj",
  "modified": "2026-05-06T12:30:31Z",
  "published": "2026-05-06T12:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43171"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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