CVE-2021-3905
HIGHCVSS 7.5/10EPSS 1.58%
Last modified
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/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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://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://ubuntu.com/security/CVE-2021-3905Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3905?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST