Cyber Resilience

CVE-2021-3905

HighPublic PoC

Published: 23 August 2022

Published
23 August 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0019 40.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-3905 is a high-severity Missing Release of Memory after Effective Lifetime (CWE-401) vulnerability in Redhat Enterprise Linux Fast Datapath. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 40.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-401

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

openvswitch
openvswitch
≤ 2.17.0
redhat
enterprise linux fast datapath
7.0, 8.0
canonical
ubuntu linux
21.10
fedoraproject
fedora
35

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References