Vulnerability-Lookup

GHSA-J3FG-H3R6-7945

Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-04-03 18:31

Details

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

nvdimm/bus: Fix potential use after free in asynchronous initialization

Dingisoul with KASAN reports a use after free if device_add() fails in nd_async_device_register().

Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while scheduling async init") correctly added a reference on the parent device to be held until asynchronous initialization was complete. However, if device_add() results in an allocation failure the ref count of the device drops to 0 prior to the parent pointer being accessed. Thus resulting in use after free.

The bug bot AI correctly identified the fix. Save a reference to the parent pointer to be used to drop the parent reference regardless of the outcome of device_add().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31399"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T16:16:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/bus: Fix potential use after free in asynchronous initialization\n\nDingisoul with KASAN reports a use after free if device_add() fails in\nnd_async_device_register().\n\nCommit b6eae0f61db2 (\"libnvdimm: Hold reference on parent while\nscheduling async init\") correctly added a reference on the parent device\nto be held until asynchronous initialization was complete.  However, if\ndevice_add() results in an allocation failure the ref count of the\ndevice drops to 0 prior to the parent pointer being accessed.  Thus\nresulting in use after free.\n\nThe bug bot AI correctly identified the fix.  Save a reference to the\nparent pointer to be used to drop the parent reference regardless of the\noutcome of device_add().",
  "id": "GHSA-j3fg-h3r6-7945",
  "modified": "2026-04-03T18:31:23Z",
  "published": "2026-04-03T18:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31399"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31399 (GCVE-0-2026-31399)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-04-03 15:16

Title

nvdimm/bus: Fix potential use after free in asynchronous initialization

Summary

In the Linux kernel, the following vulnerability has been resolved: nvdimm/bus: Fix potential use after free in asynchronous initialization Dingisoul with KASAN reports a use after free if device_add() fails in nd_async_device_register(). Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while scheduling async init") correctly added a reference on the parent device to be held until asynchronous initialization was complete. However, if device_add() results in an allocation failure the ref count of the device drops to 0 prior to the parent pointer being accessed. Thus resulting in use after free. The bug bot AI correctly identified the fix. Save a reference to the parent pointer to be used to drop the parent reference regardless of the outcome of device_add().

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/9a0fb16ba5b372465…
	https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5…
	https://git.kernel.org/stable/c/2c638259ad750833f…
	https://git.kernel.org/stable/c/a226e5b49e5fe8c98…
	https://git.kernel.org/stable/c/84af19855d1abdee3…
	https://git.kernel.org/stable/c/a8aec14230322ed8f…

Impacted products

Vendor

Product

Version

Linux

Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < 9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < 2c638259ad750833fd46a0cf57672a618542d84c (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < a226e5b49e5fe8c98b14f8507de670189d191348 (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < 84af19855d1abdee3c9d57c0684e2868e391793c (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < a8aec14230322ed8f1e8042b6d656c1631d41163 (git)
Affected: 8954771abdea5c34280870e35592c7226a816d95 (git)
Affected: 3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab (git)
Affected: 1490de2bb0836fc0631c04d0559fdf81545b672f (git)
Affected: e31a8418c8df7e6771414f99ed3d95ba8aca4e05 (git)
Affected: 4f1a55a4f990016406147cf3e0c9487bf83e50f0 (git)

Linux

Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc5 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvdimm/bus.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            {
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              "status": "affected",
              "version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5",
              "versionType": "git"
            },
            {
              "lessThan": "2c638259ad750833fd46a0cf57672a618542d84c",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5",
              "versionType": "git"
            },
            {
              "lessThan": "84af19855d1abdee3c9d57c0684e2868e391793c",
              "status": "affected",
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              "status": "affected",
              "version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5",
              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
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              "version": "3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab",
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              "version": "1490de2bb0836fc0631c04d0559fdf81545b672f",
              "versionType": "git"
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            {
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              "versionType": "git"
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            {
              "status": "affected",
              "version": "4f1a55a4f990016406147cf3e0c9487bf83e50f0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvdimm/bus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
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                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
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                  "versionEndExcluding": "6.19.10",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.9.137",
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                  "versionStartIncluding": "4.14.81",
                  "vulnerable": true
                },
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                  "versionStartIncluding": "4.18.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.19.2",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-03T15:16:03.246Z",
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      "title": "nvdimm/bus: Fix potential use after free in asynchronous initialization",
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  "cveMetadata": {
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    "cveId": "CVE-2026-31399",
    "datePublished": "2026-04-03T15:16:03.246Z",
    "dateReserved": "2026-03-09T15:48:24.085Z",
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  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-J3FG-H3R6-7945

CVE-2026-31399 (GCVE-0-2026-31399)

Tags

Sightings

Nomenclature