Race Condition Affecting bind package, versions [9.20.0,9.20.23)[9.21.0,9.21.22)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-BIND-16874104
- published25 May 2026
- disclosed20 May 2026
- creditNaoki Wakamatsu
Introduced: 20 May 2026
CVE-2026-5947 (opens in a new tab)How to fix?
Upgrade bind to version 9.20.23, 9.21.22 or higher.
Overview
Affected versions of this package are vulnerable to Race Condition in the SIG(0) validation process during a query flood when the recursive-clients limit is reached and a DNS message is discarded. An attacker can cause undefined behavior or a denial of service by flooding the server with DNS queries signed with SIG(0) to trigger a race condition that leads to use-after-free.