CVE-2021-4154

moderate-risk
Published 2022-02-04

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Do I need to act?

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0.84% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
LOCAL / LOW complexity

Affected Products (11)

Affected Vendors

Redhat Linux Netapp

References (8)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2034514
Third Party Advisory https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b...
Third Party Advisory https://security.netapp.com/advisory/ntap-20220225-0004/
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2034514
Third Party Advisory https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b...
Third Party Advisory https://security.netapp.com/advisory/ntap-20220225-0004/
46
/ 100
moderate-risk
Severity 27/34 · High
Exploitability 3/34 · Minimal
Exposure 16/34 · Moderate