CVE-2025-61664

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

Score 4.9 from GitHub Security Advisory published 2025-11-18. a secondary CVSS source baseline 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.9Exploit: None knownExposed: 0

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

A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.

CVSS v3
4.9
EG Score
4.9(medium)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity49% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

November 18, 2025

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated Jun 25, 2026
Patch available. Sources: redhat.
generic

[SECURITY PATCH 0/8] GRUB2 vulnerabilities - 2025/11/18

https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
redhat

2414685 – (CVE-2025-61664) CVE-2025-61664 grub2: Missing unregister call for normal_exit command may lead to use-after-free

https://bugzilla.redhat.com/show_bug.cgi?id=2414685
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2025-61664

Vendor Advisories for CVE-2025-61664(2)

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 11× in last 7d / 43× 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 119 total refreshes for this CVE.

  1. 2026-07-27 14:12 UTCEPSS rescore
  2. 2026-07-27 07:09 UTCOSV refresh
  3. 2026-07-26 14:54 UTCEPSS rescore
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  9. 2026-07-23 03:00 UTCEG score recompute
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  24. 2026-07-13 06:12 UTCEPSS rescore
  25. 2026-07-12 05:46 UTCEPSS rescore
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  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-10 01:45 UTCOSV refresh
  3. 2026-07-09 19:09 UTCEPSS rescore
  4. 2026-07-08 15:15 UTCEPSS rescore
  5. 2026-07-07 13:46 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
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  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-25 13:49 UTCEPSS rescore
  21. 2026-06-24 14:04 UTCEPSS rescore
  22. 2026-06-24 14:04 UTCEPSS rescore
  23. 2026-06-23 21:32 UTCEPSS rescore
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  25. 2026-06-22 14:25 UTCEPSS rescore
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
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  30. 2026-06-19 19:25 UTCEPSS rescore
  31. 2026-06-19 19:25 UTCEPSS rescore
  32. 2026-06-18 17:52 UTCEPSS rescore
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  36. 2026-06-15 17:48 UTCEPSS rescore
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  38. 2026-06-14 23:18 UTCEPSS rescore
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  40. 2026-06-13 23:00 UTCEPSS rescore
  41. 2026-06-12 23:11 UTCEPSS rescore
  42. 2026-06-11 14:00 UTCEPSS rescore
  43. 2026-06-10 22:18 UTCEPSS rescore
  44. 2026-06-10 22:18 UTCEPSS rescore
  45. 2026-06-10 13:22 UTCEPSS rescore
  46. 2026-06-08 14:17 UTCEPSS rescore
  47. 2026-06-08 14:16 UTCEPSS rescore
  48. 2026-06-07 15:24 UTCEPSS rescore
  49. 2026-06-07 15:24 UTCEPSS rescore
  50. 2026-06-06 13:47 UTCEPSS rescore
  51. 2026-06-06 13:47 UTCEPSS rescore
  52. 2026-06-05 22:46 UTCEPSS rescore
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  54. 2026-06-05 06:10 UTCEPSS rescore
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  56. 2026-06-04 13:12 UTCEPSS rescore
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  58. 2026-06-02 20:13 UTCEPSS rescore
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  60. 2026-06-01 13:51 UTCEPSS rescore
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  66. 2026-05-29 13:44 UTCEPSS rescore
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  74. 2026-05-26 13:44 UTCEPSS rescore
  75. 2026-05-26 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-61664?
CVE-2025-61664 is a medium vulnerability published on November 18, 2025. A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after…
When was CVE-2025-61664 disclosed?
CVE-2025-61664 was first published in the National Vulnerability Database on November 18, 2025, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-61664 actively exploited?
CVE-2025-61664 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 96.5% of all scored CVEs.
What is the CVSS score of CVE-2025-61664?
CVE-2025-61664 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2025-61664?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-61664, 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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