Medium
5.3
A flaw was found in dnsmasq. The TCP DNS service uses a small fixed pool of child processes and...
CVE-2026-93007
First seen on SecPulse
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Ceph Storage 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | — | — |
| Red Hat | Red Hat OpenStack Platform 18.0 | — | — |
Original description The description as published by the source.
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.
Source: CVE.org (CVE Program・cvelistV5) NVD GitHub Advisory
References
- web access.redhat.com
- web bugzilla.redhat.com
- web nvd.nist.gov
- web github.com