Use After Free Affecting dnsdist package, versions [1.9.0-alpha0,1.9.12)[2.0.0-alpha0,2.0.3)
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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Test your applications- Snyk IDSNYK-UNMANAGED-DNSDIST-15915722
- published6 Apr 2026
- disclosed31 Mar 2026
- creditUnknown
Introduced: 31 Mar 2026
NewCVE-2026-27853 (opens in a new tab)How to fix?
Upgrade dnsdist to version 1.9.12, 2.0.3 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free via the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. An attacker can cause a crash and disrupt service by sending specially crafted DNS responses that result in rewritten packets exceeding the maximum allowed size.