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La ruta de preparaci\u00f3n inicializa los argumentos de la solicitud, pero no inicializa la propia informaci\u00f3n.\n\nSi la operaci\u00f3n de espera se completa sin informar un evento hijo, el c\u00f3digo de espera com\u00fan puede regresar sin escribir wo_info. En ese caso, io_waitid_finish() todav\u00eda copia iw->info al espacio de usuario, exponiendo bytes obsoletos del almacenamiento de comandos io_kiocb reutilizado.\n\nLimpiar el almacenamiento de resultados durante la preparaci\u00f3n para que la ruta de io_uring coincida con la llamada al sistema waitid regular, que utiliza una estructura waitid_info inicializada a cero."}], "id": "CVE-2026-46315", "lastModified": "2026-11-06T17:17:55.573", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46315", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:13:58.822519Z", "version": "2.0.3"}}]}, "published": "2026-06-09T09:16:30.330", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4d2a0de611ab60d02fc768ae0cd5918b16bd5474"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/93d93f5f8da791e98159795c6ef683f45bd95d13"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/954518e5a4a5efc5033253f6e36fc7b9f98363a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b737c6612c60c23b40a9f31749b99e6f61943847"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring/waitid: clear waitid info before copying it to userspace", "id": "2486933", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486933"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-909", "details": ["A flaw was found in the Linux kernel's `io_uring` subsystem, specifically within the `IORING_OP_WAITID` operation. This vulnerability occurs because the `waitid` information structure is not properly initialized before being copied to userspace. A local user could exploit this to expose stale data from previously used kernel memory, leading to information disclosure."], "name": "CVE-2026-46315", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "2026-06-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46315\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46315\nhttps://lore.kernel.org/linux-cve-announce/2026060920-CVE-2026-46315-2caa@gregkh/T"], "threat_severity": "Moderate"}

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