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WARN_ON_ONCE(msk->pm.local_addr_used == 0) ... antes de decrementar el contador local_addr_used ayud\u00f3 a encontrar un error al ejecutar la subprueba \"eliminar una sola direcci\u00f3n\" de las autopruebas mptcp_join.sh. Eliminar un extremo 'se\u00f1al' activar\u00e1 la eliminaci\u00f3n de todos los subflujos vinculados a este extremo a trav\u00e9s de mptcp_pm_nl_rm_addr_or_subflow() con rm_type == MPTCP_MIB_RMSUBFLOW. Esto decrementar\u00e1 el contador local_addr_used, lo cual es incorrecto en este caso porque este contador est\u00e1 vinculado a extremos 'subflow', y aqu\u00ed es un extremo 'se\u00f1al' el que se est\u00e1 eliminando. Ahora, el contador se reduce solo si el ID se usa fuera de mptcp_pm_nl_rm_addr_or_subflow(), solo para los puntos finales de 'subflujo' y, si el ID no es 0, local_addr_used no los tiene en cuenta. 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{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: mptcp: pm: only mark 'subflow' endp as available", "id": "2311707", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2311707"}, "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": "verified"}, "cwe": "CWE-691", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmptcp: pm: only mark 'subflow' endp as available\nAdding the following warning ...\nWARN_ON_ONCE(msk->pm.local_addr_used == 0)\n... before decrementing the local_addr_used counter helped to find a bug\nwhen running the \"remove single address\" subtest from the mptcp_join.sh\nselftests.\nRemoving a 'signal' endpoint will trigger the removal of all subflows\nlinked to this endpoint via mptcp_pm_nl_rm_addr_or_subflow() with\nrm_type == MPTCP_MIB_RMSUBFLOW. This will decrement the local_addr_used\ncounter, which is wrong in this case because this counter is linked to\n'subflow' endpoints, and here it is a 'signal' endpoint that is being\nremoved.\nNow, the counter is decremented, only if the ID is being used outside\nof mptcp_pm_nl_rm_addr_or_subflow(), only for 'subflow' endpoints, and\nif the ID is not 0 -- local_addr_used is not taking into account these\nones. This marking of the ID as being available, and the decrement is\ndone no matter if a subflow using this ID is currently available,\nbecause the subflow could have been closed before."], "name": "CVE-2024-45010", "package_state": [{"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": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-09-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-45010\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-45010\nhttps://lore.kernel.org/linux-cve-announce/2024091107-CVE-2024-45010-33ee@gregkh/T"], "threat_severity": "Moderate"}

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