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5.9

BIND may crash when handling bad network packets

published 4 days ago
Summary

The BIND DNS server can stop working if it receives malformed network packets because a timing issue causes an internal check to fail. This can lead to the service shutting down, interrupting name resolution for users. Update to the latest BIND release or apply the vendor's patch to prevent the crash.

What to do
  • Update cleanstart bind to version 9.14.4-r0.
Affected software
Ecosystem VendorProductAffected versions
CleanStart cleanstart bind < 9.14.4-r0
Fix: upgrade to 9.14.4-r0
Original advisory text
race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch
Security vulnerability affects the bind package. A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.9 Medium
Timeline
Published31 Oct 2026
Updated31 Oct 2026
First seen31 Oct 2026
Sources
CLEANSTART-2025-ES66923 · OSV
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