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CVE-2024-50032 (GCVE-0-2024-50032)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2025-06-18 13:37
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This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

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        "dateUpdated": "2025-06-18T13:37:31.817Z",
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    "dateRejected": "2025-06-18T13:37:31.817Z",
    "dateReserved": "2024-10-21T12:17:06.069Z",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix rcuog wake-up from offline softirq\n\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\n\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\n\n        WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\n        Modules linked in: rcutorture torture\n        CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\n        Stopper: multi_cpu_stop+0x0/0x320 \u003c- __stop_cpus+0xd0/0x120\n        RIP: 0010:smp_call_function_single\n        \u003cIRQ\u003e\n        swake_up_one_online\n        __call_rcu_nocb_wake\n        __call_rcu_common\n        ? rcu_torture_one_read\n        call_timer_fn\n        __run_timers\n        run_timer_softirq\n        handle_softirqs\n        irq_exit_rcu\n        ? tick_handle_periodic\n        sysvec_apic_timer_interrupt\n        \u003c/IRQ\u003e\n\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()."
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rcu/nocb: Se ha corregido la activaci\u00f3n de rcuog desde un softirq sin conexi\u00f3n. Despu\u00e9s de que una CPU se haya desconectado y antes de que finalmente llame a rcutree_report_cpu_dead(), a\u00fan hay oportunidades para que se pongan en cola devoluciones de llamadas, por ejemplo, desde un softirq. Cuando eso sucede en NOCB, la activaci\u00f3n de rcuog se pospone a trav\u00e9s de una IPI a una CPU en l\u00ednea para no llamar al programador y correr el riesgo de armar el ancho de banda RT despu\u00e9s de que los temporizadores hr se hayan migrado y deshabilitado. Pero realizar una IPI sincronizada desde un softirq tiene errores, como se informa en el siguiente escenario: ADVERTENCIA: CPU: 1 PID: 26 en kernel/smp.c:633 smp_call_function_single M\u00f3dulos vinculados en: rcutorture torture CPU: 1 UID: 0 PID: 26 Comm: immigration/1 No contaminado 6.11.0-rc1-00012-g9139f93209d1 #1 Detenedor: multi_cpu_stop+0x0/0x320 \u0026lt;- __stop_cpus+0xd0/0x120 RIP: 0010:smp_call_function_single  swake_up_one_online __call_rcu_nocb_wake __call_rcu_common ? rcu_torture_one_read call_timer_fn __run_timers run_timer_softirq handle_softirqs irq_exit_rcu ? tick_handle_periodic sysvec_apic_timer_interrupt  Solucione esto forzando la activaci\u00f3n diferida de rcuog a trav\u00e9s del temporizador NOCB cuando la CPU est\u00e9 fuera de l\u00ednea. La activaci\u00f3n real se realizar\u00e1 desde rcutree_report_cpu_dead()."
        }
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      "id": "CVE-2024-50032",
      "lastModified": "2024-10-25T15:34:22.353",
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              "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",
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      "title": "kernel: rcu/nocb: Fix rcuog wake-up from offline softirq",
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