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.

CVSS v3.1

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

CVSS v2.0

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

1.21% chance of exploitation in the next 30 days, 66th percentile

Published

2022-02-04

Updated

2024-08-03

Proof-of-concept exploits (2)

• Markakd/CVE-2021-415466★ · 2022-10-07
• veritas501/CVE-2021-41547★ · 2023-03-02

References

• CVE Record
• NVD entry

Related

• CVE-2021-3715
• CVE-2022-20409
• CVE-2022-2588
• CVE-2021-22555
• CVE-2022-0185
• CVE-2022-0847