CVE-2026-43124

A flaw was found in the Linux kernel's pstore ram_core component. A local attacker could exploit a vulnerability where the persistent_ram_buffer_map() function incorrectly returns success even when the underlying vmap() memory mapping operation fails. This occurs if a non-zero offset is used, leading to attempts to access an invalid memory address. Successful exploitation of this flaw would result in a system crash, causing a Denial of Service (DoS).

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