CVE-2023-40022

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.3% (21st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2023-44641 (ENISA EUVD)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Rizin is a UNIX-like reverse engineering framework and command-line toolset. Versions 0.6.0 and prior are vulnerable to integer overflow in consume_count of src/gnu_v2/cplus-dem.c. The overflow check is valid logic but, is missing the modulus if the block once compiled. The compiler sees this block as unreachable code since the prior statement is multiplication by 10 and fails to consider overflow assuming the count will always be a multiple of 10. Rizin version 0.6.1 contains a fix for the issue. A temporary workaround would be disabling C++ demangling using the configuration option bin.demangle=false.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 24, 2023

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Oct 25, 2026
Fix named in the CVE record. Sources: github_pr, github, github_commit.
GitHub pull request

[gnuv2] Fix multiplication overflow check due compiler optimizations

Fix merged in rizinorg/rz-libdemangle PR #54 on 2023-08-13 — awaiting tagged release

https://github.com/rizinorg/rz-libdemangle/pull/54
GitHub commit

commit 51d016750e70 (rizinorg/rz-libdemangle)

Fix landed in rizinorg/rz-libdemangle commit 51d016750e70 — awaiting tagged release

https://github.com/rizinorg/rz-libdemangle/commit/51d016750e704b27ab8ace23c0f72acabca67018
GitHub advisoryMentions a patch (unverified)

Integer Overflow in C++ demangler logic · Advisory · rizinorg/rizin · GitHub

https://github.com/rizinorg/rizin/security/advisories/GHSA-92h6-wwc2-53cq
GitHub pull request

Update rz-libdemangle

Fix merged in rizinorg/rizin PR #3753 on 2023-08-14 — awaiting tagged release

https://github.com/rizinorg/rizin/pull/3753

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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 89 of 214 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. 11 repeat rows among the latest 100 are merged into the row they repeat. The 125 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.3% · 21st percentile
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  7. 2026-10-28 15:14 UTCEG score recompute
  8. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.3% · 21st percentile
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  10. 2026-10-25 17:37 UTCEG score recompute
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  16. 2026-10-20 23:29 UTCEG score recompute
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  20. 2026-10-18 07:54 UTCEG score recompute
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  1. 2026-10-12 18:21 UTCEG score recompute
  2. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-11 21:47 UTCEG score recompute
  4. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-10-09 21:55 UTCOSV refresh
  7. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  9. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  14. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-09-30 16:28 UTCEG score recompute
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  18. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  25. 2026-09-20 06:08 UTCOSV refresh
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  40. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  41. 2026-09-01 09:29 UTCOSV refresh
  42. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-40022?
CVE-2023-40022 is a high-severity vulnerability; its CVE record was published on August 24, 2023. Rizin is a UNIX-like reverse engineering framework and command-line toolset. Versions 0.6.0 and prior are vulnerable to integer overflow in consume_count of src/gnu_v2/cplus-dem.c. The overflow check is valid logic but, is missing the modulus if the block once compiled. The compiler sees this block…
When was the CVE record for CVE-2023-40022 published?
The CVE record for CVE-2023-40022 was published on August 24, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2023-40022 actively exploited?
CVE-2023-40022 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-40022?
CVE-2023-40022 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-40022?
The CVE record for CVE-2023-40022 names the fix: "Rizin version 0.6.1 contains a fix for the issue."

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