CVE-2021-3905
CVSS v3
7.5
HIGH
EPSS Score
2.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-08-23
Frequently asked questions
What is CVE-2021-3905?
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.
Is CVE-2021-3905 actively exploited?
Active exploitation of CVE-2021-3905 has not been confirmed. Its EPSS score was 2.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3905?
CVE-2021-3905 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-3905 affecting your environment?
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