CVE-2023-2598: Linux Kernel

High severity, CVSS 7.8. EPSS: 1.4% chance of exploitation in the next 30 days.

A flaw was found in the fixed buffer registration code for io_uring (io_sqe_buffer_register in io_uring/rsrc.c) in the Linux kernel that allows out-of-bounds access to physical memory beyond the end of the buffer. This flaw enables full local privilege escalation.

Affected products

• Linux Linux Kernel: from 6.3, before 6.3.2 (fixed in 6.3.2)
• Netapp Hci Baseboard Management Controller: version h300s only; version h410c only; version h410s only; version h500s only; version h700s only

Published 2023-06-01. Last modified 2026-06-17.