CVE-2021-20194
- Source
- https://cve.org/CVERecord?id=CVE-2021-20194
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20194.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-20194
- Downstream
- Related
- Published
- 2021-02-23T23:15:13Z
- Modified
- 2026-04-16T04:39:16Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20194.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.5"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.6"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
}
]