named configured to answer from stale cache may terminate unexpectedly while processing RRSIG queries
Published Jan 25, 2023
7.5
HIGHCVSS 3.1
EPSS 48.71%
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 products
-
- Version 9.16.12StatusaffectedConstraints<=9.16.36
- Version 9.16.12-S1StatusaffectedConstraints<=9.16.36-S1
- Version 9.18.0StatusaffectedConstraints<=9.18.10
- Version 9.19.0StatusaffectedConstraints<=9.19.8
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
- ≥ 9.16.12 · < 9.16.37
- ≥ 9.18.0 · < 9.18.11
- ≥ 9.19.0 · < 9.19.9
- 9.16.11
- 9.16.13
- 9.16.14
- 9.16.21
- 9.16.32
- 9.16.36
No data.
Red Hat Enterprise Linux 8
bind9.16-32:9.16.23-0.14.el8
Fixed · RHSA-2023:2792
Red Hat Enterprise Linux 9
bind-32:9.16.23-11.el9
Fixed · RHSA-2023:2261
Red Hat Enterprise Linux 6
bind
Not affected
Red Hat Enterprise Linux 7
bind
Not affected
Red Hat Enterprise Linux 8
bind
Not affected
Red Hat Enterprise Linux 9
dhcp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | bind9.16-32:9.16.23-0.14.el8 | Fixed | RHSA-2023:2792 |
| Red Hat Enterprise Linux 9 | bind-32:9.16.23-11.el9 | Fixed | RHSA-2023:2261 |
| Red Hat Enterprise Linux 6 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 7 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 8 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 9 | dhcp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.37, 9.18.11, 9.19.9, or 9.16.37-S1.
Red Hat statement
The flaw exists in the implementation of the stale-answer-client-timeout option, which was first effectively introduced in bind 9.16.12.
Red Hat mitigation
Setting stale-answer-client-timeout to 0 or to off/disabled will prevent BIND from crashing due to this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Apr 1, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 48.71% (0.48707) | 98.84th | v5 (v2026.06.15) |
| Jul 19, 2026 | 48.43% (0.48427) | 98.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 50.45% (0.50451) | 98.77th | v5 (v2026.06.15) |
| Apr 27, 2026 | 2.53% (0.02526) | 85.48th | v4 (v2025.03.14) |
| Nov 21, 2025 | 1.52% (0.01516) | 80.65th | v4 (v2025.03.14) |
| Nov 18, 2025 | 0.40% (0.00401) | 58.03th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.55% (0.01546) | 79.68th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.10% (0.07104) | 85.55th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.55% (0.01546) | 80.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00093) | 41.33th | v3 (v2023.03.01) |
| Jul 7, 2024 | 0.09% (0.00090) | 38.81th | v3 (v2023.03.01) |
| May 3, 2024 | 0.08% (0.00081) | 34.35th | v3 (v2023.03.01) |
| Feb 1, 2024 | 0.08% (0.00078) | 32.16th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00063) | 25.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Jan 26, 2023 | 0.89% (0.00885) | 27.43th | v2 (v2022.01.01) |
References (5)
- https://access.redhat.com/security/cve/CVE-2022-3736 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2164038 Issue Tracking
- https://kb.isc.org/docs/cve-2022-3736 vendor-advisoryVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-3736
- https://www.cve.org/CVERecord?id=CVE-2022-3736
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-3736 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2164038 | Issue Tracking | |
| https://kb.isc.org/docs/cve-2022-3736 | vendor-advisoryVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-3736 | ||
| https://www.cve.org/CVERecord?id=CVE-2022-3736 |
Change history (0)
No recorded changes yet.