CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.8. It affects Linux.
CVE
CVE-2021-20194
Severity
HIGH
CVSS
7.8
EPSS
0.40%
Linux
Original NVD Description
There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.
Related CVEs
Other vulnerabilities affecting the same vendor(s)