CVE-2026-98542Low· 2.3▾ SunlitA flaw was found in the Linux kernel's cpuset subsystem, which can lead to a denial of service (DoS) or compromised resource isolation. A local user with permissions to configure control groups (cgroups) can trigger this flaw by creating a…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 12.6 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
Last analysed / modified upstream
0.2%
— → 2.3
none → low
A flaw was found in the Linux kernel's cpuset subsystem, which can lead to a denial of service (DoS) or compromised resource isolation. A local user with permissions to configure control groups (cgroups) can trigger this flaw by creating a remote partition that requests processor cores already allocated to an ancestor partition. Because the kernel fails to reject the conflicting request, multiple partitions can improperly claim exclusive access to the same central processing unit (CPU) cores, generating kernel warnings and causing inconsistent resource management.
kernel: cgroup/cpuset: Return PERR_NOCPUS in remote_partition_enable() on subpartitions_cpus conflict — rated Low by Red Hat. Released 2026-10-18, updated 2026-10-19.
Affected:
No fix planned:
Not affected:
Fix deferred
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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