CVE-2026-93007
Medium
Description
A flaw was found in dnsmasq. The TCP DNS service uses a small fixed pool of child processes and does not set a receive timeout on client connections. A remote attacker can open idle TCP connections to port 53 and occupy the entire pool, preventing new TCP DNS connections and DNSSEC validation that requires TCP fallback. UDP DNS resolution continues, and occupied slots are released after a fixed lifetime.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Microsoft Azl3 Dnsmasq
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_dnsmasq_2.93-1 | No range specified | — |
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