CVE-2026-43113

A flaw was found in the wl1251 Wi-Fi driver within the Linux kernel. The wl1251_tx_packet_cb() function processes firmware completion IDs without proper validation, allowing an attacker to use a crafted ID to access memory outside of allocated bounds. This out-of-bounds access could lead to memory corruption and potentially a denial of service.

Red Hat acknowledges the upstream Linux kernel correction for «wifi» 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 wl1251 module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.