CVE-2026-31523

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There's a brief\nwindow during a reset where a hipri task may try to poll that queue\nbefore the block layer has updated the queue maps, which would race with\nthe now interrupt driven queue and may cause double completions."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvme-pci: asegurar que estamos sondeando una cola sondeada\n\nUn usuario puede cambiar el recuento de colas sondeadas en tiempo de ejecuci\u00f3n. Hay una breve ventana durante un reinicio donde una tarea de alta prioridad puede intentar sondear esa cola antes de que la capa de bloques haya actualizado los mapas de cola, lo que competir\u00eda con la cola ahora impulsada por interrupciones y puede causar dobles finalizaciones."}], "id": "CVE-2026-31523", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31523", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:37:23.406892Z", "version": "2.0.3"}}]}, "published": "2026-04-22T14:16:52.263", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0685dd9cb855ab77fcf3577b4702ba1d6df1c98d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/166e31d7dbf6aa44829b98aa446bda5c9580f12a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f12734c4b619f923a4df0b1a46b8098b187d324"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/965e2c943f065122f14282a88d70a8a92e12a4da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/acbc72dd1a09df53cafcf577259f4678be6afd6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b222680ba55e018426c4535067a008f1d81a5d21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ba167d5982e2eb6ff9356d409eca592ce99555da"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nvme-pci: ensure we're polling a polled queue", "id": "2460658", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460658"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's Non-Volatile Memory Express (NVMe) PCI driver. A local user can trigger a race condition during a system reset by changing the polled queue count. This vulnerability allows a high-priority task to attempt to poll a queue before the system's queue maps are updated, leading to \"double completions.\" This can result in system instability or a denial of service (DoS)."], "name": "CVE-2026-31523", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31523\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31523\nhttps://lore.kernel.org/linux-cve-announce/2026042212-CVE-2026-31523-1f48@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,965e2c943f065122f14282a88d70a8a92e12a4da)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ba167d5982e2eb6ff9356d409eca592ce99555da)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,0685dd9cb855ab77fcf3577b4702ba1d6df1c98d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6f12734c4b619f923a4df0b1a46b8098b187d324)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,acbc72dd1a09df53cafcf577259f4678be6afd6d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b222680ba55e018426c4535067a008f1d81a5d21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,166e31d7dbf6aa44829b98aa446bda5c9580f12a)"}}], "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": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.253,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.203,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.168,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.131,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.80,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.21,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.11,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-04-29T02:45:34.024978+00:00", "value": {"mitigation_remediation": ["Upgrade the Linux kernel to a release that contains the nvme\u2011pci polled queue fix provided by your distribution, which addresses the CWE\u2011367 race condition", "Reboot the system so the updated kernel and NVMe subsystem take effect", "Monitor I/O performance and kernel logs for any anomalous I/O behavior after the update"], "summary": {"action": "Apply Patch", "impact": "Race condition in the NVMe PCI driver that may cause double completion of I/O requests"}, "threat_synthesis": {"affected_systems": "All Linux kernel releases that include the nvme\u2011pci driver before the polled\u2011queue patch is applied, including the 7.0 release candidates. The issue is present in the mainline kernel where the driver was vulnerable.", "description_and_impact": "The Linux kernel\u2019s NVMe PCI driver contains a race condition (CWE\u2011367) in which a user\u2011initiated change to the polled queue count during a reset can trigger a high\u2011priority task to poll the queue before the block layer updates the queue maps. This timing gap may cause the same I/O request to be completed twice, potentially leading to unexpected kernel behavior. The vulnerability does not explicitly enumerate the consequences of double completions, but the duplication of completion events could disrupt normal I/O flow and destabilize the driver.", "risk_and_exploitability": "The vulnerability is scored with a CVSS score of 4.7, indicating moderate risk. The EPSS score of less than 1\u202f% reflects very low exploitation likelihood. Because the flaw requires modifying driver parameters that are typically privileged, the attack vector is local rather than remote. The flaw is not present in the CISA KEV catalog."}}}}, "created": "2026-04-22T20:15:20.261375+00:00", "updated": "2026-04-29T02:45:35.951797+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}