CVE-2021-4204

Name: CVE-2021-4204
Creator: NVD / NIST
Published: 2022-08-24T16:15:09.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2021-4204 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

Description

An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

1.09%

61.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.8.0
Linux	Linux Kernel	5.8.0
Debian	Debian Linux	11.0
Redhat	Enterprise Linux	9.0
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions

References

https://access.redhat.com/security/cve/CVE-2021-4204Mitigation, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2039178Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-4204Third Party Advisory
https://security.netapp.com/advisory/ntap-20221228-0003/Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/11/4Mailing List, Patch, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4204Mitigation, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2039178Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-4204Third Party Advisory
https://security.netapp.com/advisory/ntap-20221228-0003/Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/11/4Mailing List, Patch, Third Party Advisory

Timeline

Published: Aug 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4204?

How severe is CVE-2021-4204?

CVE-2021-4204 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4204?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4204?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST