CVE-2026-63862
Description
A flaw was found in the Linux kernel's MediaTek PCIe (Peripheral Component Interconnect Express) generation 3 driver. This vulnerability occurs because interrupt request (IRQ) domains are allocated before verifying the controller's IRQ. If the IRQ fetch fails, the allocated domains are not properly released, leading to a resource leak. An attacker could potentially exploit this to cause resource exhaustion, which may result in system instability or a denial of service.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)
An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.
Frequently Asked Questions
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