CVE-2026-36499 in vSwitch

Summary

by MITRE • 06/04/2026

A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.

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• Responsible: MITRE
• Reservation: 04/06/2026
• Disclosure: 06/04/2026
• Moderation: accepted
• Entry: VDB-368403
• CPE: ready
• CWE: CWE-404 (confirmed)
• CVSS: 6.5 (CISA-ADP)
• EPSS: 0.00000
• KEV: no
• Activities: low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-36499
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-36499
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-36499/