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CVE-2022-3736

named configured to answer from stale cache may terminate unexpectedly while processing RRSIG queries

HIGH
7.5
CVSS Score
Published: January 25, 2023 at 09:39 PM UTC
Updated: June 17, 2026 at 05:00 AM UTC
1 product affected across 1 vendorBIND

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Severity
HIGH7.5
Exploit prediction
EPSS 49%
SSVC
No known exploit

Description

BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

BIND· Isc
95%
9.16.12 ≤ v ≤ 9.16.369.16.12 ≤ v < 9.16.379.16.12-S1 ≤ v ≤ 9.16.36-S19.18.0 ≤ v ≤ 9.18.109.18.0 ≤ v < 9.18.119.19.0 ≤ v ≤ 9.19.89.19.0 ≤ v < 9.19.99.16.11 s19.16.129.16.12-S19.16.13 s19.16.14 s19.16.21 s19.16.32 s19.16.36 s19.18.09.19.0
Affected range stops below 9.16.37, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.18.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.19.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://kb.isc.org/docs/cve-2022-3736

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHisc
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-20

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