CVE-2026-43464

A flaw was found in the Linux kernel's mlx5e driver. When using eXpress Data Path (XDP) multi-buffer programs, an attacker could manipulate the XDP buffer layout. This manipulation leads to incorrect tracking of page fragments, causing a critical error in memory management. The issue can result in a system crash or denial of service.

Red Hat acknowledges the upstream Linux kernel correction for «net/mlx5e» 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.

To mitigate this issue, prevent the mlx5_core module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.