CVE-2021-3905

Name: CVE-2021-3905
Creator: NVD / NIST
Published: 2022-08-23T16:15:10.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.58%

Last modified Jun 17, 2026

CVE-2021-3905 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could use this flaw to potentially exhaust available memory by keeping sending packet fragments.. EPSS estimates a 1.58% chance of exploitation in the next 30 days.

Description

A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could use this flaw to potentially exhaust available memory by keeping sending packet fragments.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.58%

72.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Openvswitch	Openvswitch	< 2.17.0
Redhat	Enterprise Linux Fast Datapath	7.0
Redhat	Enterprise Linux Fast Datapath	8.0
Canonical	Ubuntu Linux	21.10
Fedoraproject	Fedora	35

References

https://access.redhat.com/security/cve/CVE-2021-3905Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2019692Issue Tracking, Patch, Third Party Advisory
https://github.com/openvswitch/ovs-issues/issues/226Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349Patch, Third Party Advisory
https://security.gentoo.org/glsa/202311-16
https://ubuntu.com/security/CVE-2021-3905Patch, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3905Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2019692Issue Tracking, Patch, Third Party Advisory
https://github.com/openvswitch/ovs-issues/issues/226Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349Patch, Third Party Advisory
https://security.gentoo.org/glsa/202311-16
https://ubuntu.com/security/CVE-2021-3905Patch, Third Party Advisory

Timeline

Published: Aug 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3905?

How severe is CVE-2021-3905?

CVE-2021-3905 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3905?

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-2021-3905?

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

Scan your code now

Source: NVD / NIST