CVE-2026-90109

A flaw was found in the Linux kernel. A local attacker with root privileges could exploit a 32-bit integer overflow vulnerability in the networking scheduler's gred, bfifo, and plug enqueue functions. This occurs when the queue backlog, stored as a 32-bit integer, exceeds 4 Gigabytes (GiB). The integer then wraps around, causing the system to incorrectly admit more packets than the queue limit. This unbounded queue growth can lead to an Out-Of-Memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

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.