kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout

A use-after-free flaw was found in cgroup1parseparam 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 ...

CVE-2021-4154

A use-after-free flaw was found in cgroup1parseparam 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 ...

PT-2021-1524 · Linux +8 · Linux Kernel +8

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A use-after-free flaw was found in the cgroup v1 parser, specifically in the cgroup1 parse param function in kernel/cgroup/cgroup-v1.c. This issue can be exploited by a local attacker...