CVE-2026-43374

A flaw was found in the Linux kernel's networking (net: nexthop) component. When a nexthop is removed from a group, the system prematurely frees per-CPU (percpu) statistics memory. This timing issue allows other parts of the kernel that are still referencing the old group to access and potentially corrupt the freed memory. This use-after-free vulnerability can lead to system instability or a denial of service.

Red Hat acknowledges the upstream Linux kernel correction for «net» 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.