CVE-2023-5370

MEDIUMNVD 5.55.5—

5.5

On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 33.3%
KEV: Not listed

Published

October 4, 2023

Last Modified

November 21, 2024

References (4)

secteam@freebsdhttps://security.FreeBSD.org/advisories/FreeBSD-SA-23:14.smccc.asc
secteam@freebsdhttps://security.netapp.com/advisory/ntap-20231124-0005/
af854a3a-2127-422b-91ae-364da2661108https://security.FreeBSD.org/advisories/FreeBSD-SA-23:14.smccc.asc
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231124-0005/

Weakness Classification(1)

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

CWE-665

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 16:33 UTCEG score recompute
2026-05-24 16:33 UTCGHSA enrichment
2026-05-24 14:21 UTCOSV refresh

Frequently asked(5)

What is CVE-2023-5370?

CVE-2023-5370 is a medium vulnerability published on October 4, 2023. On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.

When was CVE-2023-5370 disclosed?

CVE-2023-5370 was first published in the National Vulnerability Database on October 4, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-5370 actively exploited?

CVE-2023-5370 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-5370?

CVE-2023-5370 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2023-5370?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5370, 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.

Dependency Blast Radius

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CVE-2023-5370

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-5370?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)