Integer Overflow or Wraparound Affecting nsd package, versions [4.14.0,4.14.3)
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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- published28 Jun 2026
- disclosed25 Jun 2026
- creditUnknown
Introduced: 25 Jun 2026
CVE-2026-12244 (opens in a new tab)How to fix?
Upgrade nsd to version 4.14.3 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound in the processing of AXFR transfers containing specially crafted SVCB resource records with an rdata size of 65512. An attacker can cause a heap overflow and potentially execute arbitrary code or crash the process by sending a maliciously crafted DNS message from a primary server to a secondary server. This is only exploitable if the server is configured as a secondary for a zone and receives AXFR transfers from an attacker-controlled primary.