CVE-2026-43267

A flaw was found in the rtw89 Wi-Fi driver within the Linux kernel. This vulnerability occurs when the beacon interval, a timing parameter used in Wi-Fi communication, is set to zero. This can lead to a division by zero error during subsequent calculations, potentially causing system instability or a denial of service (DoS). An attacker could potentially exploit this by sending a specially crafted Wi-Fi beacon.

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 rtw89 module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.