CVE-2026-43214

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for x86 architectures. When reading Page Directory Pointer Table Registers (PDPTRs) in the __get_sregs2() function, the system fails to use proper Sleepable Read-Copy Update (SRCU) protection. This oversight can lead to incorrect memory access when dereferencing memory slots, potentially allowing a guest operating system to cause a denial of service on the host system.

Red Hat acknowledges the upstream Linux kernel correction for «KVM» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.