Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | All versions |
| Redhat | Openshift Container Platform | 4.4 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1912683Issue TrackingPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210326-0003/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1912683Issue TrackingPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210326-0003/Third Party Advisory
FAQ
What is CVE-2021-20194?
CVE-2021-20194 is a vulnerability with a CVSS score of 7.8 (HIGH). 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_HARDE...
How severe is CVE-2021-20194?
CVE-2021-20194 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20194?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Openshift Container Platform, Redhat Enterprise Linux.