Strix
26.1K

CVE-2021-4154

HIGHCVSS 8.8/10EPSS 1.21%

Last modified

CVE-2021-4154 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
1.21%

64.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
LinuxLinux Kernel>= 5.1, < 5.4.134—
LinuxLinux Kernel>= 5.5, < 5.10.52—
LinuxLinux Kernel>= 5.11, < 5.12.19—
LinuxLinux Kernel>= 5.13, < 5.13.4—
LinuxLinux Kernel5.14Rc1
RedhatVirtualization4.0—
RedhatEnterprise Linux8.0—
NetappHci Baseboard Management Controllerh300e—
NetappHci Baseboard Management Controllerh300s—
NetappHci Baseboard Management Controllerh410s—
NetappHci Baseboard Management Controllerh500e—
NetappHci Baseboard Management Controllerh500s—
NetappHci Baseboard Management Controllerh700e—
NetappHci Baseboard Management Controllerh700s—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-4154?
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.
How severe is CVE-2021-4154?
CVE-2021-4154 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4154?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4154?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST