Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
CVE Vulnerability Details :
CVE-2026-11622
PUBLISHED
More InfoOfficial Page
Assigner-isc
Assigner Org ID-404fd4d2-a609-4245-b543-2c944a302a22
View Known Exploited Vulnerability (KEV) details
Published At-22 Jul, 2026 | 14:12
Updated At-22 Jul, 2026 | 18:53
Rejected At-
▼CVE Numbering Authority (CNA)
Potential memory usage beyond configured limits

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.

Affected Products
Vendor
Internet Systems Consortium, Inc.ISC
Product
BIND 9
Default Status
unaffected
Versions
Affected
  • From 9.11.0 through 9.18.50 (custom)
  • From 9.20.0 through 9.20.24 (custom)
  • From 9.21.0 through 9.21.23 (custom)
  • From 9.11.3-S1 through 9.18.50-S1 (custom)
  • From 9.20.9-S1 through 9.20.24-S1 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-770CWE-770 Allocation of Resources Without Limits or Throttling
Type: CWE
CWE ID: CWE-770
Description: CWE-770 Allocation of Resources Without Limits or Throttling
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
N/AMemory usage may exceed configured limits, and response rate may be affected.
CAPEC ID: N/A
Description: Memory usage may exceed configured limits, and response rate may be affected.
Solutions

Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.26, 9.21.24, or 9.20.26-S1.

Configurations
Workarounds

No workarounds known.

Exploits

This flaw was discovered in internal testing. We are not aware of any active exploits.

Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://kb.isc.org/docs/cve-2026-11622
vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.26
patch
https://downloads.isc.org/isc/bind9/9.21.24
patch
Hyperlink: https://kb.isc.org/docs/cve-2026-11622
Resource:
vendor-advisory
Hyperlink: https://downloads.isc.org/isc/bind9/9.20.26
Resource:
patch
Hyperlink: https://downloads.isc.org/isc/bind9/9.21.24
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found