CVE-2024-36405

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for -Os, -O1, and other compilation options. A proof-of-concept local attack on the reference implementation leaks the entire ML-KEM 512 secret key in ~10 minutes using end-to-end decapsulation timing measurements. The issue has been fixed in version 0.10.1. As a possible workaround, some compiler options may produce vectorized code that does not leak secret information, however relying on these compiler options as a workaround may not be reliable.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

June 10, 2024

Last Modified

August 20, 2025

References (8)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-09-19 15:40 UTCEPSS rescore
  2. 2026-09-18 19:26 UTCEPSS rescore
  3. 2026-09-16 14:06 UTCEPSS rescore
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  18. 2026-09-02 02:08 UTCOSV refresh
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  1. 2026-08-25 13:47 UTCEPSS rescore
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  10. 2026-08-16 05:08 UTCOSV refresh
  11. 2026-08-16 02:13 UTCEPSS rescore
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  29. 2026-07-31 22:42 UTCOSV refresh
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  40. 2026-07-23 02:37 UTCEG score recompute
  41. 2026-07-22 14:07 UTCEPSS rescore
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  43. 2026-07-21 15:23 UTCEPSS rescore
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  45. 2026-07-20 17:06 UTCEPSS rescore
  46. 2026-07-19 14:30 UTCEPSS rescore
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  51. 2026-07-16 17:02 UTCEPSS rescore
  52. 2026-07-15 16:56 UTCEPSS rescore
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  54. 2026-07-15 01:59 UTCEPSS rescore
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  56. 2026-07-14 05:55 UTCOSV refresh
  57. 2026-07-13 22:29 UTCEPSS rescore
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  65. 2026-07-07 13:45 UTCEPSS rescore
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  72. 2026-06-30 23:21 UTCEPSS rescore
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  74. 2026-06-29 14:05 UTCEPSS rescore
  75. 2026-06-28 14:06 UTCEPSS rescore

Frequently asked(5)

What is CVE-2024-36405?
CVE-2024-36405 is a medium vulnerability published on June 10, 2024. liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for -Os, -O1, and other…
When was CVE-2024-36405 disclosed?
CVE-2024-36405 was first published in the National Vulnerability Database on June 10, 2024, with the most recent update on August 20, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-36405 actively exploited?
CVE-2024-36405 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.2% of all scored CVEs.
What is the CVSS score of CVE-2024-36405?
CVE-2024-36405 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2024-36405?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-36405, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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