CVE-2026-11622
published 2026-07-22CVE-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…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.52%
42.5th percentile
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
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| isc | bind | — | — |
| isc | bind_9 | 9.11.0 – 9.18.50 | — |
| isc | bind_9 | 9.11.3-S1 – 9.18.50-S1 | — |
| isc | bind_9 | 9.20.0 – 9.20.24 | — |
| isc | bind_9 | 9.20.9-S1 – 9.20.24-S1 | — |
| isc | bind_9 | 9.21.0 – 9.21.23 | — |
| ubuntu | bind9 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
vendor_ubuntu6.8MEDIUM
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Ubuntu
Bind vulnerabilities
vendor_ubuntu·2026-08-19·CVSS 6.8
CVE-2026-11721 [MEDIUM] Bind vulnerabilities
Title: Bind vulnerabilities
Summary: Several security issues were fixed in Bind.
It was discovered that Bind incorrectly accepted NSEC3 records whose signer
name did not match the owning zone. A remote attacker could possibly use
this issue to perform NSEC3 impersonation attacks, bypassing DNSSEC
validation. (CVE-2026-10723)
It was discovered that Bind incorrectly handled Key Records using the
PRIVATEDNS algorithm. A remote attacker could possibly use this issue to
cause Bind to crash, resulting in a denial of service. (CVE-2026-10822)
It was discovered that Bind incorrectly handled wildcard CNAME expansion in
Response Policy Zones. A remote attacker could possibly use this issue to
bypass configured RPZ policies. (CVE-2026-11331)
It was discovered that Bind performed unnecessary vali
Red Hat
bind: bind9: Potential memory usage beyond configured limits
vendor_redhat·2026-07-22·CVSS 7.5
CVE-2026-11622 [HIGH] CWE-400 bind: bind9: Potential memory usage beyond configured limits
bind: bind9: 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.
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
GHSA
A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage.
ghsa_unreviewed·2026-07-22
CVE-2026-11622 [HIGH] CWE-770 A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage.
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.
No detection rules found.
No public exploits indexed.
2026-07-22
Published