CVE-2026-23287

A flaw was found in the Linux kernel's irqchip/sifive-plic component. When an interrupt's affinity setting is changed while a hardware thread (hart) is still processing the interrupt, the Programmable Interrupt Controller (PLIC) may ignore the interrupt completion message. This can lead to the interrupt becoming frozen, causing a Denial of Service (DoS) where affected hardware, such as a Universal Asynchronous Receiver-Transmitter (UART) port, becomes unresponsive.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.