CVE-2021-20194

Source
https://nvd.nist.gov/vuln/detail/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
Related
Published
2021-02-23T23:15:13Z
Modified
2024-09-18T01:00:22Z
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 CONFIGBPFSYSCALL=y , CONFIGBPF=y , CONFIGCGROUPS=y , CONFIGCGROUPBPF=y , CONFIGHARDENEDUSERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in _cgroupbpfrunfilter_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

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.19-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.19-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.19-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}