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

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-05-23 16:04
VLAI
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < 6fc36c2a925ceaba203eb13d75a8f0879a2c121b (git)
Affected: b6eae0f61db27748606cc00dafcfd1e2c032f0a5 , < a36cf138500e56f50db9f9a33222df6969b38326 (git)
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)
Affected: 4.4.164 , < 4.5 (semver)
Affected: 4.9.137 , < 4.10 (semver)
Affected: 4.14.81 , < 4.15 (semver)
Affected: 4.18.19 , < 4.19 (semver)
Affected: 4.19.2 , < 4.20 (semver)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (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 , ≤ * (original_commit_for_fix)
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                "negate": false,
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvdimm/bus: Soluciona un posible uso despu\u00e9s de liberar en la inicializaci\u00f3n as\u00edncrona\n\nDingisoul con KASAN informa de un uso despu\u00e9s de liberar si device_add() falla en nd_async_device_register().\n\nEl commit b6eae0f61db2 (\u0027libnvdimm: Mantener referencia en el padre mientras se programa la inicializaci\u00f3n as\u00edncrona\u0027) a\u00f1adi\u00f3 correctamente una referencia en el dispositivo padre para ser mantenida hasta que la inicializaci\u00f3n as\u00edncrona estuviera completa. Sin embargo, si device_add() resulta en un fallo de asignaci\u00f3n, el contador de referencias del dispositivo cae a 0 antes de que se acceda al puntero padre. Resultando as\u00ed en un uso despu\u00e9s de liberar.\n\nLa IA del bot de errores identific\u00f3 correctamente la soluci\u00f3n. Guarda una referencia al puntero padre para ser utilizada para liberar la referencia padre independientemente del resultado de device_add()."
          }
        ],
        "id": "CVE-2026-31399",
        "lastModified": "2026-07-24T22:10:00.140",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-04-03T16:16:38.410",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
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            "url": "https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"
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          },
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:25:01+00:00",
      "cve": "CVE-2026-31399",
      "id": "CVE-2026-31399",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nvdimm/bus: Fix potential use after free in asynchronous initialization",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31399.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:32:50Z",
      "cve": "CVE-2026-31399",
      "id": "CVE-2026-31399",
      "initial_release_date": "2026-04-03T23:25:48Z",
      "product_status:known_affected": "406",
      "product_status:known_not_affected": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31399",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31399.json",
      "version": "9"
    }
  }
}



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Sightings

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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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.