CVE-2023-1637

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2023-03-28. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86 CPU Power management options functionality was found in the way user resuming CPU from suspend-to-RAM. A local user could use this flaw to potentially get unauthorized access to some memory of the CPU similar to the speculative execution behavior kind of attacks.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
12.9%
KEV
Not listed

Published

March 27, 2023

Last Modified

February 19, 2025

References (5)

Vendor Advisories for CVE-2023-1637(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-rt-0:4.18.0-305.108.1.rt7.183.el8_42023-10-17redhat
redhatkernel-0:4.18.0-305.108.1.el8_42023-10-10redhat
redhatkernel-0:4.18.0-477.27.1.el8_82023-09-19redhat
redhatkernel-rt-0:4.18.0-477.27.1.rt7.290.el8_82023-09-19redhat
redhatkernel-rt-0:5.14.0-284.30.1.rt14.315.el9_22023-09-12redhat
redhatkernel-0:5.14.0-284.30.1.el9_22023-09-12redhat
redhatkernel-0:4.18.0-372.70.1.el8_62023-08-29redhat

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.

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 12× in last 7d / 47× 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 106 total refreshes for this CVE.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
  3. 2026-07-20 17:05 UTCEPSS rescore
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  12. 2026-07-16 01:49 UTCOSV refresh
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  47. 2026-06-10 12:47 UTCOSV refresh
  48. 2026-06-08 14:15 UTCEPSS rescore
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  50. 2026-06-07 15:23 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-1637?
CVE-2023-1637 is a medium vulnerability published on March 27, 2023. A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86 CPU Power management options functionality was found in the way user resuming CPU from suspend-to-RAM. A local user could use this flaw to potentially get unauthorized access to…
When was CVE-2023-1637 disclosed?
CVE-2023-1637 was first published in the National Vulnerability Database on March 27, 2023, with the most recent update on February 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-1637 actively exploited?
CVE-2023-1637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-1637?
CVE-2023-1637 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-1637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-1637, 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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