GHSA-3886-873F-6XPF

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-25 09:31
VLAI
Details

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

drm/vc4: fix krealloc() memory leak

Don't just overwrite the original pointer passed to krealloc() with its return value without checking latter:

MEM = krealloc(MEM, SZ, GFP);

If krealloc() returns NULL, that erases the pointer to the still allocated memory, hence leaks this memory. Instead, use a temporary variable, check it's not NULL and only then assign it to the original pointer:

TMP = krealloc(MEM, SZ, GFP);
if (!TMP) return;
MEM = TMP;

While on it, use krealloc_array().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53213"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: fix krealloc() memory leak\n\nDon\u0027t just overwrite the original pointer passed to krealloc()\nwith its return value without checking latter:\n\n    MEM = krealloc(MEM, SZ, GFP);\n\nIf krealloc() returns NULL, that erases the pointer\nto the still allocated memory, hence leaks this memory.\nInstead, use a temporary variable, check it\u0027s not NULL\nand only then assign it to the original pointer:\n\n    TMP = krealloc(MEM, SZ, GFP);\n    if (!TMP) return;\n    MEM = TMP;\n\nWhile on it, use krealloc_array().",
  "id": "GHSA-3886-873f-6xpf",
  "modified": "2026-06-25T09:31:21Z",
  "published": "2026-06-25T09:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53213"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02f5e4db57c0cdd7bac89d503b301a093a0fa95c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30165a09f76eaf34951c818eb5d9d6e4771d76f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fc692dc6df5bc777cc1bcebf95179e28594875f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d563a5da8717629ae72f9eadf1e0e340bd1658b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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