dnsdist: An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted wit...
CVE-2026-40011 is fixed in dnsdist on 1 platform, first by DEBIAN-CVE-2026-40011, released June 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.
An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dnsdist · Debian 13.5 (trixie) | 1.9.15-0+deb13u1 | DEBIAN-CVE-2026-40011 | Jun 26, 2026 |
| dnsdist · Debian 14 | 2.1.0-1 | DEBIAN-CVE-2026-40011 | Jun 26, 2026 |
| dnsdist · opensuse-leap 16.0 | 1.9.15-160000.1.1 | OPENSUSE-SU-2026:21533-1 | Aug 5, 2026 |
| dnsdist · sles 16.0 | 1.9.15-160000.1.1 | SUSE-SU-2026:23146-1 | Aug 5, 2026 |
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