The code that processes control channel messages sent to named calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing named to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary.
This issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1.
CVE-2023-3341
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-09-20. NVD baseline CVSS 7.5; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 50EG Risk 50/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation2.9% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 2.9%
- EPSS %ILE
- 86th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 2.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 20, 2023
Last Modified
December 2, 2025
References (8)
- security-officer@isc · CVE Programhttp://www.openwall.com/lists/oss-security/2023/09/20/2Mailing List · Patch
- security-officer@isc · CVE Programhttps://kb.isc.org/docs/cve-2023-3341Vendor Advisory
- security-officer@isc · CVE Programhttps://lists.debian.org/debian-lts-announce/2024/01/msg00021.htmlThird Party Advisory
- security-officer@isc · CVE Programhttps://lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/Mailing List
- security-officer@isc · CVE Programhttps://lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/Mailing List
- security-officer@isc · CVE Programhttps://lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/Mailing List · Third Party Advisory
- security-officer@isc · CVE Programhttps://security.netapp.com/advisory/ntap-20231013-0003/Third Party Advisory
- security-officer@isc · CVE Programhttps://www.debian.org/security/2023/dsa-5504Third Party Advisory
Vendor Advisories for CVE-2023-3341(12)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2025:0039Red Hat Product SecurityHigh
Red Hat Security Advisory: bind and bind-dyndb-ldap security update
- CVE-2023-3341Microsoft Security Response Center (MSRC)High
A stack exhaustion flaw in control channel code may cause named to terminate unexpectedly
- RHSA-2023:5771Red Hat Product SecurityHigh
Red Hat Security Advisory: bind9.16 security update
- RHSA-2023:5691Red Hat Product SecurityHigh
Red Hat Security Advisory: bind security update
- RHSA-2023:5689Red Hat Product SecurityHigh
Red Hat Security Advisory: bind security update
- RHSA-2023:5690Red Hat Product SecurityHigh
Red Hat Security Advisory: bind security update
- RHSA-2023:5526Red Hat Product SecurityHigh
Red Hat Security Advisory: bind security update
- RHSA-2023:5527Red Hat Product SecurityHigh
Red Hat Security Advisory: bind security update
- +4 more
Patch Availability(13)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | dnsutils (1:9.18.12-1ubuntu1.2) @ lunar | 2026-05-24 | ubuntu |
| ubuntu | lwresd (1:9.10.3.dfsg.P4-8ubuntu1.19+esm7) @ xenial | 2026-05-24 | ubuntu |
| redhat | bind-dyndb-ldap-0:2.3-8.el6_10.1 | 2025-01-06 | redhat |
| redhat | bind9.16-32:9.16.23-0.7.el8_6.3 | 2023-10-17 | redhat |
| redhat | bind-32:9.11.4-26.P2.el7_9.15 | 2023-10-12 | redhat |
| redhat | bind-32:9.16.23-1.el9_0.3 | 2023-10-12 | redhat |
| redhat | bind-32:9.16.23-11.el9_2.2 | 2023-10-12 | redhat |
| redhat | bind-32:9.11.4-26.P2.el8_1.8 | 2023-10-09 | redhat |
| redhat | bind-32:9.11.26-4.el8_4.3 | 2023-10-09 | redhat |
| redhat | bind-32:9.11.13-6.el8_2.6 | 2023-10-09 | redhat |
| redhat | bind-32:9.11.36-3.el8_6.5 | 2023-10-05 | redhat |
| redhat | bind-32:9.11.36-8.el8_8.2 | 2023-10-05 | redhat |
| redhat | bind9.16-32:9.16.23-0.14.el8_8.2 | 2023-10-05 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(15 across 15 ecosystems)
Alpine:v3.15(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.16(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.17(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.18(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.19(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.20(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind | — |
| — |
Debian:10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind9 | 1:9.11.5.P4+dfsg-5.1 ... 1:9.11.5.P4+dfsg-5.1+deb10u9 (10 versions) |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind9 | 1:9.16.15-1 ... 1:9.16.42-1~deb11u1 (10 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind9 | 1:9.18.12-1 ... 1:9.18.19-1~deb12u1~bpo11+1 (6 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind9 | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| bind9 | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(2)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 8× in last 7d / 33× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 83 of 193 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 17 repeat rows among the latest 100 are merged into the row they repeat. The 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-20 16:30 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-18 08:00 UTCEG score recompute
- 2026-10-17 16:30 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-16 16:36 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-15 16:29 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-13 16:30 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-13 01:54 UTCOSV refresh
- 2026-10-12 18:26 UTCEG score recompute
- 2026-10-12 16:31 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-11 21:52 UTCEG score recompute
- 2026-10-11 13:45 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-10 19:57 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-08 17:06 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-06 15:15 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-30 16:24 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-29 15:17 UTCEPSS rescoreEPSS 2.9% · 86th percentile
Show 58 moreShow fewer
- 2026-09-28 13:49 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-27 13:42 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-26 15:56 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 2.9% · 86th percentile
- 2026-09-22 23:32 UTCOSV refresh
- 2026-09-20 20:14 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-18 19:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-17 19:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-16 05:11 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-12 14:58 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-11 14:50 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-11 09:34 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-08 21:58 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-06 13:45 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-05 15:26 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-04 13:58 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-04 05:04 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-03 18:16 UTCOSV refresh
- 2026-09-02 14:09 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-09-01 13:51 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-30 01:20 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-28 21:39 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-27 14:23 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-26 14:43 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-25 13:46 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-21 23:47 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-19 17:02 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-18 13:46 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-17 13:45 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-17 07:31 UTCOSV refresh
- 2026-08-16 14:54 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-16 02:12 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-15 01:28 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-13 21:58 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-12 13:48 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-11 13:39 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-08 16:35 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-07 16:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-06 13:45 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-05 19:15 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-04 15:07 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-03 10:34 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-02 02:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-08-02 02:06 UTCOSV refresh
- 2026-08-01 04:13 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-07-30 16:26 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-07-30 01:28 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-07-28 15:34 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-07-26 14:52 UTCEPSS rescoreEPSS 2.6% · 84th percentile
- 2026-07-25 14:16 UTCEPSS rescoreEPSS 2.6% · 83rd percentile
- 2026-07-24 14:16 UTCEPSS rescoreEPSS 2.6% · 83rd percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:10:bind9
- CVE-2021-25216NVD 8.1EG 9.8EPSS p100CRITICAL
- CVE-2020-8617NVD 7.5EG 9.0EPSS p100CRITICAL
- CVE-2020-8625NVD 8.1EG 8.7EPSS p99HIGH
- CVE-2021-25220NVD 6.8EG 8.6HIGH
- CVE-2020-8616EG 8.6EPSS p96HIGH
- CVE-2022-38178EG 7.5HIGH
- CVE-2022-38177EG 7.5HIGH
- CVE-2022-2795NVD 5.3EG 7.5HIGH
- CVE-2021-25215EG 7.5EPSS p96HIGH
- CVE-2020-8623EG 7.5EPSS p94HIGH
Same vendor
4 shownredhat:RHSA-2025:0039 · ubuntu:USN-6390-1
Frequently asked(5)
What is CVE-2023-3341?
When was CVE-2023-3341 made public?
Is CVE-2023-3341 actively exploited?
What is the CVSS score of CVE-2023-3341?
How do I remediate CVE-2023-3341?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-3341
Is Your Infrastructure Affected by CVE-2023-3341?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.