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GHSA-R48M-H265-23MG

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

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

dm era: fix NULL pointer dereference in metadata_open()

metadata_open() returns NULL when kzalloc_obj() fails, but the caller era_ctr() only checks IS_ERR(md). Since IS_ERR(NULL) returns false, the NULL pointer is treated as a valid result and later assigned to era->md, leading to a NULL pointer dereference when the metadata is accessed.

Fix this by returning ERR_PTR(-ENOMEM) on allocation failure, consistent with dm-cache-metadata.c, dm-thin-metadata.c, and dm-clone-metadata.c which all use ERR_PTR(-ENOMEM) for the same pattern.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72316"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:04Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm era: fix NULL pointer dereference in metadata_open()\n\nmetadata_open() returns NULL when kzalloc_obj() fails, but the\ncaller era_ctr() only checks IS_ERR(md).  Since IS_ERR(NULL)\nreturns false, the NULL pointer is treated as a valid result\nand later assigned to era-\u003emd, leading to a NULL pointer\ndereference when the metadata is accessed.\n\nFix this by returning ERR_PTR(-ENOMEM) on allocation failure,\nconsistent with dm-cache-metadata.c, dm-thin-metadata.c, and\ndm-clone-metadata.c which all use ERR_PTR(-ENOMEM) for the\nsame pattern.",
  "id": "GHSA-r48m-h265-23mg",
  "modified": "2026-08-15T06:32:20Z",
  "published": "2026-08-15T06:32:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72316"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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