CVE-2024-45056

MEDIUMNVD 5.95.9
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: nvd
Elevated
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 0

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

zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold (xor (shl 1, x), -1) to (rotl ~1, x) if run with optimizations enabled. Here ~1 is generated as an unsigned 64 bits number (2^64-1). This number is zero-extended to 256 bits on EraVM target while it should have been sign-extended. Thus instead of producing roti 2^256 - 1, x the compiler produces rotl 2^64 - 1, x. Analysis has shown that no contracts were affected by the date of publishing this advisory. This issue has been addressed in version 1.5.3. Users are advised to upgrade and redeploy all contracts. There are no known workarounds for this vulnerability.

CVSS v3
5.9
EG Score
5.9(low)
EG Risk
—
EPSS
32.9%
KEV
Not listed

Published

August 29, 2024

Last Modified

September 3, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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.

  1. 2026-07-22 14:07 UTCEPSS rescore
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  1. 2026-07-06 16:26 UTCEPSS rescore
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  43. 2026-06-08 14:16 UTCEPSS rescore
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  45. 2026-06-07 22:55 UTCOSV refresh
  46. 2026-06-07 15:24 UTCEPSS rescore
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  48. 2026-06-06 13:46 UTCEPSS rescore
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  73. 2026-05-26 07:18 UTCEPSS rescore
  74. 2026-05-23 11:48 UTCEG score recompute

Frequently asked(5)

What is CVE-2024-45056?
CVE-2024-45056 is a medium vulnerability published on August 29, 2024. zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold (xor (shl 1, x), -1) to (rotl ~1, x) if run with optimizations enabled. Here ~1 is generated as an unsigned 64 bits number (2^64-1). This number is zero-extended to 256 bits on EraVM target while it should have been…
When was CVE-2024-45056 disclosed?
CVE-2024-45056 was first published in the National Vulnerability Database on August 29, 2024, with the most recent update on September 3, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-45056 actively exploited?
CVE-2024-45056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-45056?
CVE-2024-45056 has a CVSS v3 base score of 5.9 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2024-45056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-45056, 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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