What is CVE-2021-20239?

CVE-2021-20239 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10. CVE-2021-20239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-20239?

CVE-2021-20239 has a CVSS score of 3.3 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Is there a patch available for CVE-2021-20239?

No patch is currently available for CVE-2021-20239. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-20239 actively exploited?

CVE-2021-20239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-20239

Low

A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.

Package Linux Kernel

Published 2021-05-28

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

3.3

out of 10

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness type

CWE-822

CVE-2021-20239 is classified as CWE-822

See CWE-822 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-20239 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1923636

Issue Tracking Third Party Advisory

Details

CVE ID CVE-2021-20239

Severity Low

CVSS score 3.3 / 10

CVSS version 3.1

Published 2021-05-28

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-20239?

CVE-2021-20239 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10 . CVE-2021-20239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-20239?

CVE-2021-20239 has a CVSS score of 3.3 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Is there a patch available for CVE-2021-20239?

No patch is currently available for CVE-2021-20239. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-20239 actively exploited?

No — CVE-2021-20239 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.