CVE-2026-89565
Description
A flaw was found in the Linux kernel's IP over IP (ipip) tunnel driver. When operating in collect_md mode, the ipip_tunnel_rcv() function fails to free a network packet buffer (skb) if the metadata_dst allocation fails. This oversight leads to a memory leak. A local attacker could potentially exploit this vulnerability to exhaust system memory, resulting in a Denial of Service (DoS).
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
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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