Allocation of Resources Without Limits or Throttling Affecting unbound package, versions [1.22.0,1.25.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-32665 (opens in a new tab)How to fix?
Upgrade unbound to version 1.25.2 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via improper validation of client-provided data length in the process handling DNS-over-QUIC connections. An attacker can cause excessive memory allocation and exhaust configured memory limits by sending specially crafted data, resulting in service unavailability for new clients. This is only exploitable if DNS-over-QUIC (DoQ) is enabled in the configuration.
Workaround
This vulnerability can be mitigated by disabling DNS-over-QUIC (DoQ) in the configuration and restarting the service.