CVSS 3.1
8.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HCVE-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.
Severity
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)
- CWE
- CWE-416
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linux:linux_kernel
- netapp:hci_baseboard_management_controller
- redhat:enterprise_linux
- redhat:virtualization
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514
- https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b
- https://security.netapp.com/advisory/ntap-20220225-0004/
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514