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CVE-2026-72409: Linux

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net: mvneta: re-enable percpu interrupt on resume On Marvell MPIC platforms (Armada 370/XP/38x), mvneta uses a percpu IRQ disable/enable scheme for NAPI: the ISR (mvneta_percpu_isr) calls disable_percpu_irq() to mask the MPIC per-CPU interrupt and schedules NAPI poll, which calls enable_percpu_irq() on completion to unmask. If suspend occurs while NAPI poll is pending (between disable_percpu_irq in the ISR and enable_percpu_irq in poll completion), the interrupt is never re-enabled: 1. mvneta_percpu_isr: disable_percpu_irq() + napi_schedule() => MPIC masked, percpu_enabled cpumask bit cleared 2. NAPI poll does not complete before suspend proceeds (on PREEMPT_RT this is highly likely since softirqs run in ksoftirqd which gets frozen; on non-RT it can happen when softirq processing is deferred to ksoftirqd) 3. mvneta_stop_dev => napi_disable(): cancels the pending poll without executing the completion path 4. suspend_device_irqs => IRQCHIP_MASK_ON_SUSPEND: masks MPIC (already masked, but records IRQS_SUSPENDED) 5. Resume: mpic_resume checks irq_percpu_is_enabled() => false (bit was cleared in step 1) => skips unmask 6. mvneta_start_dev only restores device-level INTR_NEW_MASK, does not touch the MPIC per-CPU mask Result: MPIC per-CPU interrupt stays masked permanently. The NIC generates interrupts (INTR_NEW_CAUSE != 0) but the CPU never receives them, causing complete loss of network connectivity. Fix by calling on_each_cpu(mvneta_percpu_enable) in the resume path to unconditionally unmask the MPIC per-CPU interrupt regardless of pre-suspend state.

Засегнати продукти

  • Linux Linux: 12bb03b436dad56692e9a103ed26156156bef5d2 преди bf88cd3b649bc3e638f1e8a77649581852747a68; 12bb03b436dad56692e9a103ed26156156bef5d2 преди 8c7a489aa71d2693752b2e794a68bf672d16c829; 12bb03b436dad56692e9a103ed26156156bef5d2 преди 82c13027ed283b856017adee970dbfdffce5c6b8; 12bb03b436dad56692e9a103ed26156156bef5d2 преди be626ac1faadd49c2cead9f9cd06ba8752d81563; 12bb03b436dad56692e9a103ed26156156bef5d2 преди 1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6; 12bb03b436dad56692e9a103ed26156156bef5d2 преди b84dd48f9da1eb132bdc06a944423cd5a1641ef1; 12bb03b436dad56692e9a103ed26156156bef5d2 преди 5bdb33ff6e58bdc43632e98b30723eb65352d671; 12bb03b436dad56692e9a103ed26156156bef5d2 преди fd398d6480987e4c84fff0aaab6b9d6642a93343
  • Linux Linux: 4.4; преди 4.4; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72409: Linux | freedomonline.bg