CVE-2021-20194CWE-20

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 …

published February 23, 2021

CVSS
—
EPSS
0%
Percentile
33.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00400 · 33.1th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-02-23T22:33Z
EPSS history
Timeline
  • 23 FEB 22:33Z
    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 …
    cvelistv5