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FKIE_CVE-2026-72316

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-era-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a705e056c2f3dd067fb2ff414f0537530baa090b",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "bd5a80128bdfc93b1cae935a70da000b8c483e6e",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "01c49eae7c6256f2d8cc08210a2bac3ee070e43a",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "14e03ecd3b1b5fc03c082b27a2f8889f8290c30e",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "b69ea153d30ce19ca8997eeeca1e2219fae5a29b",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            },
            {
              "lessThan": "9ae672606c17891d90b282e3490b817620549599",
              "status": "affected",
              "version": "eec40579d84873dfb7021eb24c50360f073237c5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-era-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.15"
            },
            {
              "lessThan": "3.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-72316",
  "lastModified": "2026-08-17T06:18:34.890",
  "metrics": {},
  "published": "2026-08-15T06:22:04.503",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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