CVE-2025-4437

MEDIUMNVD 5.75.7—
EchelonGraph scoreMEDIUM confidence

Score 5.7 from GitHub Security Advisory published 2025-08-20. NVD baseline CVSS 5.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.7Exploit: None knownExposed: 0

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

There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running in the same host.

CVSS v3
5.7
EG Score
5.7(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: 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
Severity57% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 20, 2025

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
Patch available. Sources: redhat.
redhat Patch Available

2375084 – (CVE-2025-4437) CVE-2025-4437 cri-o: Large /etc/passwd file may lead to Denial of Service

https://bugzilla.redhat.com/show_bug.cgi?id=2375084
redhat Patch Available

CVE-2025-4437 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2025-4437

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/cri-o/cri-o—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/cri-o/cri-o———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 33× 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 192 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:29 UTCEPSS rescore
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  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 12:30 UTCGHSA enrichment
  19. 2026-09-01 11:57 UTCEG score recompute
  20. 2026-09-01 11:57 UTCGHSA enrichment
  21. 2026-09-01 04:38 UTCEPSS rescore
  22. 2026-08-31 16:43 UTCGHSA enrichment
  23. 2026-08-31 15:09 UTCEG score recompute
  24. 2026-08-31 15:09 UTCGHSA enrichment
  25. 2026-08-30 19:16 UTCEPSS rescore
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  1. 2026-08-30 01:21 UTCEPSS rescore
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  8. 2026-08-21 23:48 UTCEPSS rescore
  9. 2026-08-21 13:24 UTCGHSA enrichment
  10. 2026-08-21 12:50 UTCEG score recompute
  11. 2026-08-21 12:50 UTCGHSA enrichment
  12. 2026-08-20 22:54 UTCEPSS rescore
  13. 2026-08-19 17:03 UTCEPSS rescore
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  20. 2026-08-12 13:50 UTCEPSS rescore
  21. 2026-08-11 13:41 UTCEPSS rescore
  22. 2026-08-10 23:59 UTCEPSS rescore
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-08 16:36 UTCEPSS rescore
  25. 2026-08-06 13:46 UTCEPSS rescore
  26. 2026-08-05 19:16 UTCEPSS rescore
  27. 2026-08-04 15:09 UTCEPSS rescore
  28. 2026-08-04 10:37 UTCEPSS rescore
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  39. 2026-07-24 14:17 UTCEPSS rescore
  40. 2026-07-23 14:18 UTCEPSS rescore
  41. 2026-07-23 02:56 UTCEG score recompute
  42. 2026-07-22 14:07 UTCEPSS rescore
  43. 2026-07-22 14:07 UTCEPSS rescore
  44. 2026-07-21 15:24 UTCEPSS rescore
  45. 2026-07-20 17:07 UTCEPSS rescore
  46. 2026-07-19 14:30 UTCEPSS rescore
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  48. 2026-07-19 02:28 UTCEPSS rescore
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  50. 2026-07-18 10:04 UTCEPSS rescore
  51. 2026-07-16 17:02 UTCEPSS rescore
  52. 2026-07-16 17:02 UTCEPSS rescore
  53. 2026-07-15 16:57 UTCEPSS rescore
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  55. 2026-07-15 01:59 UTCEPSS rescore
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  61. 2026-07-11 08:27 UTCEPSS rescore
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  63. 2026-07-09 19:09 UTCEPSS rescore
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  65. 2026-07-08 15:15 UTCEPSS rescore
  66. 2026-07-07 13:45 UTCEPSS rescore
  67. 2026-07-06 16:27 UTCEPSS rescore
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  69. 2026-07-06 02:23 UTCEPSS rescore
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  73. 2026-07-02 17:01 UTCEPSS rescore
  74. 2026-07-01 15:06 UTCEPSS rescore
  75. 2026-06-30 23:22 UTCEPSS rescore

Related CVEs(same product + same CWE)

Same product

1 shown

go:github.com/cri-o/cri-o

Frequently asked(5)

What is CVE-2025-4437?
CVE-2025-4437 is a medium vulnerability published on August 20, 2025. There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high…
When was CVE-2025-4437 disclosed?
CVE-2025-4437 was first published in the National Vulnerability Database on August 20, 2025, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-4437 actively exploited?
CVE-2025-4437 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.8% of all scored CVEs.
What is the CVSS score of CVE-2025-4437?
CVE-2025-4437 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2025-4437?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-4437, 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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