Vulnerability · Published Jun 4, 2026 · Assigned by mitre
CVE-2026-36499
Medium 6.5
In plain English
A medium-severity resource allocation without limits in the openvswitch package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openvswitch | no fix listed | DEBIAN-CVE-2026-36499 |
| Debian:13 | openvswitch | no fix listed | DEBIAN-CVE-2026-36499 |
| Debian:14 | openvswitch | no fix listed | DEBIAN-CVE-2026-36499 |
| Ubuntu:22.04:LTS | openvswitch | no fix listed | UBUNTU-CVE-2026-36499 |
| Ubuntu:24.04:LTS | openvswitch | no fix listed | UBUNTU-CVE-2026-36499 |
| Ubuntu:25.10 | openvswitch | no fix listed | UBUNTU-CVE-2026-36499 |
| Ubuntu:26.04:LTS | openvswitch | no fix listed | UBUNTU-CVE-2026-36499 |
| Ubuntu:26.10 | openvswitch | no fix listed | UBUNTU-CVE-2026-36499 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H