The Linux kernel ARC EMAC ethernet driver had a vulnerability where stale or latched interrupt status left by firmware or the bootloader could trigger spurious interrupts during device teardown if the probe unwound after the IRQ handler was installed. This could cause a race condition between interrupt handling and device release. The vulnerability was addressed by putting the device into a known quiescent state before requesting the IRQ, specifically by disabling all EMAC interrupt sources and clearing any pending interrupt status bits. This hardware-focused fix prevents spurious IRQ delivery from leftover state without broader changes.

The vulnerability could lead to race conditions during device teardown caused by spurious interrupts from stale hardware interrupt status. This may affect the stability or reliability of the network device driver during shutdown or probe failure. There is no indication of privilege escalation or remote code execution. No known exploits in the wild have been reported.

A fix has been implemented in the Linux kernel to quiesce interrupts before requesting IRQ in the ARC EMAC ethernet driver. Users should update to the fixed kernel version once available. Since this is a kernel-level fix, applying the official kernel update or patch is the recommended mitigation. No alternative workarounds are indicated.