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Vulnerabilities

CVE-2026-11622 | BDVDB-2026-351639 Detail

ISCBIND 9

Description#

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Impact#

Memory usage may exceed configured limits, and response rate may be affected.

Weaknesses#

  • CWE-770 Allocation of Resources Without Limits or Throttling

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.