GHSA-8WW7-X5R5-3G8J

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 18:31
VLAI?
Details

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

pstore: ram_core: fix incorrect success return when vmap() fails

In persistent_ram_vmap(), vmap() may return NULL on failure.

If offset is non-zero, adding offset_in_page(start) causes the function to return a non-NULL pointer even though the mapping failed. persistent_ram_buffer_map() therefore incorrectly returns success.

Subsequent access to prz->buffer may dereference an invalid address and cause crashes.

Add proper NULL checking for vmap() failures.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-43124"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:29Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npstore: ram_core: fix incorrect success return when vmap() fails\n\nIn persistent_ram_vmap(), vmap() may return NULL on failure.\n\nIf offset is non-zero, adding offset_in_page(start) causes the function\nto return a non-NULL pointer even though the mapping failed.\npersistent_ram_buffer_map() therefore incorrectly returns success.\n\nSubsequent access to prz-\u003ebuffer may dereference an invalid address\nand cause crashes.\n\nAdd proper NULL checking for vmap() failures.",
  "id": "GHSA-8ww7-x5r5-3g8j",
  "modified": "2026-05-08T18:31:26Z",
  "published": "2026-05-06T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43124"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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