A flaw was found in the `sched_ext` component of the Linux kernel. This vulnerability allows a local attacker to cause a system hang by exploiting an issue in the `scx_enable()` function. The function's task switching loop can lead to indefinite starvation of the enable thread when higher-priority fair-class workloads saturate the system. This results in a Denial of Service (DoS), making the system unresponsive.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43392 https://nvd.nist.gov/vuln/detail/CVE-2026-43392 https://lore.kernel.org/linux-cve-announce/2026050837-CVE-2026-43392-00ee@gregkh/T