CVE-2021-4154
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 4, 2022
First seenFeb 4, 2022
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel5.4.134, 5.10.52, 5.12.19, 5.13.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.1 ≤ v < 5.4.134, 5.5 ≤ v < 5.10.52, 5.11 ≤ v < 5.12.19, 5.13 ≤ v < 5.13.4, 5.14 | 5.4.134, 5.10.52, 5.12.19, 5.13.4 |
| redhat virtualization | 4.0 | — |
| redhat enterprise_linux | 8.0 | — |
| netapp hci_baseboard_management_controller | h300e, h300s, h410s, h500e, h500s, h700e, h700s | — |
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