{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31399", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.085Z", "datePublished": "2026-04-03T15:16:03.246Z", "dateUpdated": "2026-05-11T22:07:56.818Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:07:56.818Z"}, "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()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvdimm/bus.c"], "versions": [{"version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5", "lessThan": "6fc36c2a925ceaba203eb13d75a8f0879a2c121b", "status": "affected", "versionType": "git"}, {"version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5", "lessThan": "a36cf138500e56f50db9f9a33222df6969b38326", "status": "affected", "versionType": "git"}, {"version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5", "lessThan": "9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d", "status": "affected", "versionType": "git"}, {"version": "b6eae0f61db27748606cc00dafcfd1e2c032f0a5", "lessThan": "e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e", "status": "affected", "versionType": "git"}, {"version": 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"lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, 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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()."}], "id": "CVE-2026-31399", "lastModified": "2026-04-18T09:16:29.987", "metrics": {}, "published": "2026-04-03T16:16:38.410", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: nvdimm/bus: Fix potential use after free in asynchronous initialization", "id": "2454871", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454871"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's nvdimm/bus component. During asynchronous device initialization, if the device_add() function fails in nd_async_device_register(), a use-after-free vulnerability can occur. This happens because the device's reference count drops to zero before the parent pointer is accessed, leading to memory corruption. A local attacker could potentially exploit this to cause system instability or execute arbitrary code."], "name": "CVE-2026-31399", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31399\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31399\nhttps://lore.kernel.org/linux-cve-announce/2026040326-CVE-2026-31399-9b84@gregkh/T"], "statement": "This vulnerability affects systems with NVDIMM (Non-Volatile DIMM) persistent memory hardware. The issue only manifests during an unlikely error path when device_add() fails due to allocation failure during asynchronous initialization. Systems without NVDIMM hardware are not affected, and the error condition is rare under normal memory conditions.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,2c638259ad750833fd46a0cf57672a618542d84c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,a226e5b49e5fe8c98b14f8507de670189d191348)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,84af19855d1abdee3c9d57c0684e2868e391793c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6eae0f61db27748606cc00dafcfd1e2c032f0a5,a8aec14230322ed8f1e8042b6d656c1631d41163)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "8954771abdea5c34280870e35592c7226a816d95"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "1490de2bb0836fc0631c04d0559fdf81545b672f"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e31a8418c8df7e6771414f99ed3d95ba8aca4e05"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "4f1a55a4f990016406147cf3e0c9487bf83e50f0"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.20"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.20)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.167,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.130,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.78,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.20,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.10,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-07T09:40:20.563315+00:00", "value": {"mitigation_remediation": ["Update the Linux kernel to a version that includes commit b6eae0f61db2 in libnvdimm (or later) which holds a reference on the parent during async initialization."], "summary": {"action": "Apply patch", "impact": "Potential use-after-free during NVDIMM device asynchronous initialization in the Linux kernel"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to the Linux kernel itself. All installations where the kernel includes the nvdimm/bus subsystem and is susceptible to asynchronous device registration would be at risk. No specific kernel version range is provided in the data, so a careful review of release notes is needed to confirm exposure.", "description_and_impact": "An attacker could trigger a use-after-free violation by causing device_add() to fail during the asynchronous initialization of a non-volatile memory device. The flaw arises because the parent device reference is released before the child device is fully initialized, leaving a dangling pointer that can be dereferenced. This denial-of-service vector undermines the stability and correctness of the kernel, potentially leading to kernel panics or loss of service for systems relying on NVDIMM devices.", "risk_and_exploitability": "The CVSS score of 4.7 places the issue in the medium severity range. Exploitation seems plausible only if an attacker can influence the creation of a non-volatile memory device whose addition fails, which suggests a local or privileged attack surface rather than a remote one. With an EPSS score of less than 1% and no listing in CISA\u2019s KEV catalog, it is unlikely to be widely exploited at this time, but the inherent use-after-free flaw warrants prompt remediation."}}}}, "created": "2026-04-03T21:13:14.345955+00:00", "updated": "2026-04-08T19:53:26.205149+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}