CVE-2026-43272

A flaw was found in the Linux kernel's ring-buffer component. This vulnerability allows a local user to potentially cause a denial of service. The issue occurs because a pointer in the rb_meta_validate_events() function is not properly initialized, and its dereference during a reader page validation failure can lead to system instability or a crash.

Red Hat acknowledges the upstream Linux kernel correction for «ring-buffer» 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.