CVE-2021-4197

HIGH
7.8
CVSS Score
Published: March 23, 2022 at 07:46 PM UTC
Updated: June 17, 2026 at 04:19 AM UTC
15 products affected across 6 vendorsLinux KernelDebian LinuxH700S Firmware

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Severity
HIGH7.8
Exploit prediction
EPSS 0.5%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.15 ≤ v < 4.19.2384.2 ≤ v < 4.14.2764.20 ≤ v < 5.4.1895.11 ≤ v < 5.15.145.5 ≤ v < 5.10.111
Affected range stops below 4.14.276, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.238, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.111, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.189, so it looks safe — our inference, not a vendor statement
All versions
netapp-h300s (same device)
All versions
netapp-h410c (same device)
All versions
netapp-h410s (same device)
All versions
netapp-h500s (same device)
All versions
netapp-h700s (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

x_refsource_MISCIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2035652
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
https://www.debian.org/security/2022/dsa-5127
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
https://www.debian.org/security/2022/dsa-5173

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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