What is CVE-2026-11622?

CVE-2026-11622 is a high-severity vulnerability in Isc Bind 9, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-22.

How severe is CVE-2026-11622?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Isc Bind 9

CVE-2026-11622

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 incr…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Isc Bind 9 — versions 9.11.0, 9.20.0, 9.21.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-officer@isc.org (vendor-advisory)
security-officer@isc.org (patch)
security-officer@isc.org (patch)

Frequently asked questions

What is CVE-2026-11622?: CVE-2026-11622 is a high-severity vulnerability in Isc Bind 9, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-22.
How severe is CVE-2026-11622?: High severity. CVSS v3 base score is 7.5 out of 10.