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
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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        }
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      "title": "nvdimm/bus: Fix potential use after free in asynchronous initialization",
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    "datePublished": "2026-04-03T15:16:03.246Z",
    "dateReserved": "2026-03-09T15:48:24.085Z",
    "dateUpdated": "2026-05-23T16:04:55.198Z",
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31399",
      "date": "2026-08-24",
      "epss": "0.00119",
      "percentile": "0.01977"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31399\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:38.410\",\"lastModified\":\"2026-07-24T22:10:00.140\",\"vulnStatus\":\"Analyzed\",\"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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/nvdimm/bus.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"6fc36c2a925ceaba203eb13d75a8f0879a2c121b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"a36cf138500e56f50db9f9a33222df6969b38326\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"2c638259ad750833fd46a0cf57672a618542d84c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"a226e5b49e5fe8c98b14f8507de670189d191348\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"84af19855d1abdee3c9d57c0684e2868e391793c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6eae0f61db27748606cc00dafcfd1e2c032f0a5\",\"lessThan\":\"a8aec14230322ed8f1e8042b6d656c1631d41163\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8954771abdea5c34280870e35592c7226a816d95\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1490de2bb0836fc0631c04d0559fdf81545b672f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e31a8418c8df7e6771414f99ed3d95ba8aca4e05\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4f1a55a4f990016406147cf3e0c9487bf83e50f0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.4.164\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.137\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.81\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.18.19\",\"lessThan\":\"4.19\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.2\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/nvdimm/bus.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.20\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.20\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.10\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.164\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"3F465C16-7558-45C0-8A57-E91446282ED2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.137\",\"versionEndExcluding\":\"4.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    "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"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.