CVE-2026-93007Medium· 5.3▾ SunlitA 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, …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.4%
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.
rhceph/alloy-rhel10 (all versions)dnsmasq (all versions)dnsmasq (all versions)dnsmasq (all versions)dnsmasq (all versions)dnsmasq (all versions)openshift4/ose-baremetal-runtimecfg-rhel8 (all versions)openshift4/ose-baremetal-runtimecfg-rhel9 (all versions)openshift/ose-rhel-coreos-8 (all versions)openshift/ose-rhel-coreos-9 (all versions)openshift5/ose-baremetal-runtimecfg-rhel9 (all versions)openshift/ose-rhel-coreos-9 (all versions)dnsmasq (all versions)rhoso-operators/infra-rhel9-operator (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
The following measures reduce risk:
Connected by shared product, vendor, weakness, or advisory.
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