sifive plic

About this tag
The sifive plic tag covers discussions about the SiFive Platform-Level Interrupt Controller (PLIC) used in RISC-V systems. Content focuses on a specific vulnerability, CVE-2026-23287, which causes frozen interrupts due to affinity-setting behavior in the irqchip/sifive-plic driver. This bug can undermine system responsiveness and is difficult to diagnose. The tag includes references to Linux kernel fixes, Microsoft vulnerability guidance, and upstream kernel discussions. Topics are limited to this interrupt controller issue and do not extend to other SiFive hardware or general RISC-V topics.

  1. CVE-2026-23287 Fix: Prevent Frozen Interrupts in SiFive PLIC IRQ Affinity

    The Linux kernel is once again at the center of a subtle but important reliability fix, and this time the issue sits inside irqchip/sifive-plic, the interrupt-controller driver used on SiFive RISC-V platforms. The vulnerability, identified as CVE-2026-23287, is described as a frozen interrupt...
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    • irq affinity linux kernel risc-v reliability sifive plic
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    • Forum: Security Alerts