CVE-2020-35498
A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to…
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.
Timeline
ID reserved
By redhat
- 56 days later
· 56 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 8.0% · top 5.2% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
openvswitch
- affected openvswitch 2.5.12, openvswitch 2.6.10, openvswitch 2.7.13, openvswitch 2.8.11, openvswitch 2.9.9, openvswitch 2.10.7, openvswitch 2.11.6, openvswitch 2.12.3, openvswitch 2.13.3, openvswitch 2.14.2
References (6)
- https://bugzilla.redhat.com/show_bug.cgi?id=1908845 (opens in a new tab)x_transferred
- https://www.openwall.com/lists/oss-security/2021/02/10/4 (opens in a new tab)x_transferred
- DSA-4852 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20210219 [SECURITY] [DLA 2571-1] openvswitch security update (opens in a new tab)mailing-listx_transferred
- FEDORA-2021-fba11d37ee (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202311-16 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-35498)Record last updated .