CVE-2021-4197
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.5%
exploitation probability
0.5%top 56% of all CVEs
observed exploitation
nono source reports it
An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
Affected products
n/a · kernelReferences
https://bugzilla.redhat.com/show_bug.cgi?id=2035652https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T/https://security.netapp.com/advisory/ntap-20220602-0006/https://www.debian.org/security/2022/dsa-5127https://www.debian.org/security/2022/dsa-5173https://www.oracle.com/security-alerts/cpujul2022.html