CVE-2026-72316 (GCVE-0-2026-72316)
Vulnerability from cvelistv5
Published
2026-08-15 05:55
Modified
2026-08-17 05:12
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
Version: eec40579d84873dfb7021eb24c50360f073237c5
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/md/dm-era-target.c"
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      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:12:21.813Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a"
        },
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          "url": "https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599"
        }
      ],
      "title": "dm era: fix NULL pointer dereference in metadata_open()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72316",
    "datePublished": "2026-08-15T05:55:30.399Z",
    "dateReserved": "2026-08-09T03:40:39.919Z",
    "dateUpdated": "2026-08-17T05:12:21.813Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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