CVE-2026-64587

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: arc: emac: quiesce interrupts before requesting IRQ

Normal RX/TX interrupts are enabled later, in arcemacopen(), so probe should not see interrupt delivery in the usual case. However, hardware may still present stale or latched interrupt status left by firmware or the bootloader.

If probe later unwinds after devmrequestirq() has installed the handler, such a stale interrupt can still reach arcemacintr() during teardown and race with release of the associated net_device.

Avoid that window by putting the device into a known quiescent state before requesting the IRQ: disable all EMAC interrupt sources and clear any pending EMAC interrupt status bits. This keeps the change hardware-focused and minimal, while preventing spurious IRQ delivery from leftover state.