Memory leak in openvswitch
Priority LOW 37CWE-401Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-401.
Summary
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.
Why it matters now
EPSS 0.02126 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 fixed, 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | openvswitch (ovs) | Fixed in v2.17.0 | — | No fix listed | CNA |
- openvswitch (ovs) Vendor— Affected Fixed in v2.17.0 Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* | before 2.17.0 | Vulnerable | Openvswitch |
| cpe:2.3:a:redhat:enterprise_linux_fast_datapath:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:enterprise_linux_fast_datapath:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* | 21.10 | Vulnerable | Canonical |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
- cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* Versions before 2.17.0 Vulnerable ·Openvswitch
- cpe:2.3:a:redhat:enterprise_linux_fast_datapath:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:enterprise_linux_fast_datapath:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* Versions 21.10 Vulnerable ·Canonical
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Fast Datapath for RHEL 7 | Affected | No fix planned: Will not fix |
| Fast Datapath for RHEL 8 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Fast Datapath for Red Hat Enterprise Linux 8 | Fixed | — |
Not affected: 7 products
- Fast Datapath for RHEL 7
- Fast Datapath for RHEL 8
- Red Hat OpenStack Platform 10 (Newton)
- Red Hat OpenStack Platform 13 (Queens)
- Red Hat OpenStack Platform 16.1
- Red Hat OpenStack Platform 16.2
- Red Hat Virtualization 4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3905
- 2026-10-03 Alias added: GHSA-w2f8-jf7v-2cj4
References
Patch 3
Sources
- CVE-2021-3905 · CVE Program
- CVE-2021-3905 · NVD
- FIRST EPSS
- GHSA-w2f8-jf7v-2cj4 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3905 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences