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CVE-2020-35498 (GCVE-0-2020-35498)

Vulnerability from cvelistv5 – Published: 2021-02-11 00:00 – Updated: 2025-04-23 19:46
VLAI
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:27 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a 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
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-28T11:28:09+00:00",
      "cve": "CVE-2020-35498",
      "id": "CVE-2020-35498",
      "initial_release_date": "2020-01-01T00:00:00+00:00",
      "product_status:fixed": "127",
      "product_status:known_affected": "44",
      "product_status:known_not_affected": "7",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openvswitch: limitation in the OVS packet parsing in userspace leads to DoS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-35498.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-02T02:28:01Z",
      "cve": "CVE-2020-35498",
      "id": "CVE-2020-35498",
      "initial_release_date": "2023-02-15T03:51:25Z",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "120",
      "product_status:recommended": "669",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-35498",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-35498.json",
      "version": "34"
    },
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      "cveMetadata": "{\"cveId\": \"CVE-2020-35498\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-23T19:46:26.834Z\", \"dateReserved\": \"2020-12-17T00:00:00.000Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2021-02-11T00:00:00.000Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.