CVE-2021-4154
HIGH 8.8EPSS 1.2%
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.
- Affected
- kernel
- CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C - EPSS
- 1.22% chance of exploitation in the next 30 days, 68th 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
Security advisories
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7…
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514
- https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002
- https://security.netapp.com/advisory/ntap-20220225-0004