CVE-2026-38640

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

A reachable unwrap in the __assert_fail function (/assert/mod.rs) of relibc commit 61f42d allows attackers to cause a Denial of Service (DoS) via a crafted string.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (4)

Auto-updated Jun 26, 2026
No patch confirmed yet.
generic

Reachable unwrap panic in `__assert_fail` (#262) · Issues · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/work_items/262
generic

fix: `to_string_lossy` for safer string conversion in `__assert_fail` (!986) · Merge requests · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/merge_requests/986
generic

Reachable unwrap panic in `__assert_fail` (#262) · Issues · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/issues/262
generic

pocs/redox/CVE-2026-38640 at master · Marsman1996/pocs · GitHub

https://github.com/Marsman1996/pocs/tree/master/redox/CVE-2026-38640

Vendor Advisories for CVE-2026-38640(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 80× 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. 2026-07-27 17:15 UTCEG score recompute
  2. 2026-07-27 17:15 UTCGHSA enrichment
  3. 2026-07-27 14:13 UTCEPSS rescore
  4. 2026-07-27 03:42 UTCGHSA enrichment
  5. 2026-07-26 14:55 UTCEG score recompute
  6. 2026-07-26 14:55 UTCGHSA enrichment
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-25 14:18 UTCEPSS rescore
  11. 2026-07-24 14:17 UTCEPSS rescore
  12. 2026-07-24 14:17 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 03:10 UTCEG score recompute
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-21 15:24 UTCEPSS rescore
  18. 2026-07-20 17:08 UTCEPSS rescore
  19. 2026-07-19 14:31 UTCEPSS rescore
  20. 2026-07-19 02:29 UTCEPSS rescore
  21. 2026-07-18 10:04 UTCEPSS rescore
  22. 2026-07-17 03:35 UTCGHSA enrichment
  23. 2026-07-16 17:03 UTCEPSS rescore
  24. 2026-07-16 14:59 UTCGHSA enrichment
  25. 2026-07-16 02:21 UTCGHSA enrichment
Show 59 more
  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 13:45 UTCGHSA enrichment
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-15 00:49 UTCGHSA enrichment
  6. 2026-07-14 12:04 UTCGHSA enrichment
  7. 2026-07-13 23:29 UTCGHSA enrichment
  8. 2026-07-13 22:30 UTCEPSS rescore
  9. 2026-07-13 10:53 UTCGHSA enrichment
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-12 22:17 UTCGHSA enrichment
  13. 2026-07-12 09:41 UTCGHSA enrichment
  14. 2026-07-12 05:46 UTCEPSS rescore
  15. 2026-07-11 21:05 UTCGHSA enrichment
  16. 2026-07-11 08:29 UTCGHSA enrichment
  17. 2026-07-11 08:27 UTCEPSS rescore
  18. 2026-07-10 19:53 UTCGHSA enrichment
  19. 2026-07-10 07:17 UTCGHSA enrichment
  20. 2026-07-09 19:10 UTCEPSS rescore
  21. 2026-07-09 18:42 UTCGHSA enrichment
  22. 2026-07-09 06:05 UTCGHSA enrichment
  23. 2026-07-08 17:29 UTCGHSA enrichment
  24. 2026-07-08 15:15 UTCEPSS rescore
  25. 2026-07-08 04:53 UTCGHSA enrichment
  26. 2026-07-07 16:15 UTCGHSA enrichment
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-07 01:52 UTCGHSA enrichment
  29. 2026-07-06 16:27 UTCEPSS rescore
  30. 2026-07-06 16:27 UTCEPSS rescore
  31. 2026-07-06 13:13 UTCGHSA enrichment
  32. 2026-07-06 02:23 UTCEPSS rescore
  33. 2026-07-06 02:23 UTCEPSS rescore
  34. 2026-07-06 00:36 UTCGHSA enrichment
  35. 2026-07-05 11:59 UTCGHSA enrichment
  36. 2026-07-05 02:30 UTCEPSS rescore
  37. 2026-07-04 23:23 UTCGHSA enrichment
  38. 2026-07-04 10:45 UTCGHSA enrichment
  39. 2026-07-04 06:31 UTCEPSS rescore
  40. 2026-07-03 22:07 UTCGHSA enrichment
  41. 2026-07-03 09:29 UTCGHSA enrichment
  42. 2026-07-02 20:53 UTCGHSA enrichment
  43. 2026-07-02 08:17 UTCGHSA enrichment
  44. 2026-07-01 19:41 UTCGHSA enrichment
  45. 2026-07-01 15:06 UTCEPSS rescore
  46. 2026-07-01 07:05 UTCGHSA enrichment
  47. 2026-06-30 23:22 UTCEPSS rescore
  48. 2026-06-30 18:30 UTCGHSA enrichment
  49. 2026-06-30 05:54 UTCGHSA enrichment
  50. 2026-06-29 17:19 UTCGHSA enrichment
  51. 2026-06-29 14:06 UTCEPSS rescore
  52. 2026-06-29 04:43 UTCEG score recompute▲ 7.50
  53. 2026-06-29 04:43 UTCGHSA enrichment
  54. 2026-06-28 14:07 UTCEPSS rescore
  55. 2026-06-28 04:56 UTCEPSS rescore
  56. 2026-06-27 03:08 UTCEPSS rescore
  57. 2026-06-26 15:40 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  58. 2026-06-25 21:46 UTCEG score recompute
  59. 2026-06-25 21:46 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-38640?
CVE-2026-38640 is a high vulnerability published on June 25, 2026. A reachable unwrap in the assert_fail function (/assert/mod.rs) of relibc commit 61f42d allows attackers to cause a Denial of Service (DoS) via a crafted string.
When was CVE-2026-38640 disclosed?
CVE-2026-38640 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38640 actively exploited?
CVE-2026-38640 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 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-38640?
CVE-2026-38640 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38640?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-38640, 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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