Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-05-08T00:00:00 kernel: sched/fair: Fix zero_vruntime tracking fix 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CWE-911

A flaw was found in the Linux kernel. Incorrect tracking of virtual runtime (zero_vruntime) in the scheduler's fair scheduling component can occur under specific conditions, such as when tasks frequently yield or when multiple control groups (cgroups) are active. This can lead to the scheduler's internal state becoming inconsistent, potentially causing system instability or unresponsiveness. A local attacker could exploit this vulnerability to cause a denial of service.

Red Hat Enterprise Linux 10 Affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Affected kernel Red Hat Enterprise Linux 7 Affected kernel-rt Red Hat Enterprise Linux 8 Affected kernel Red Hat Enterprise Linux 8 Affected kernel-rt Red Hat Enterprise Linux 9 Affected kernel Red Hat Enterprise Linux 9 Affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43323 https://nvd.nist.gov/vuln/detail/CVE-2026-43323 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43323.mbox