CVE-2025-54770

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.9Exploit: NoneExposed: 0

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

A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability

CVSS v3
4.9
EG Score
4.9(medium)
EPSS
3.0%
KEV
Not listed

Published

November 18, 2025

Last Modified

June 30, 2026

Advisory Details (4)

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

oss-security - [SECURITY PATCH 3/8] net/net: Unregister net_set_vlan command on unload

http://www.openwall.com/lists/oss-security/2025/11/18/4
generic

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

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

2413813 – (CVE-2025-54770) CVE-2025-54770 grub2: Use-after-free in net_set_vlan

https://bugzilla.redhat.com/show_bug.cgi?id=2413813
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2025-54770

Vendor Advisories for CVE-2025-54770(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 9× in last 7d / 39× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-10 01:45 UTCOSV refresh
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  1. 2026-06-21 14:56 UTCEPSS rescore
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  60. 2026-05-21 22:43 UTCEPSS rescore
  61. 2026-05-21 04:32 UTCEG score recompute
  62. 2026-05-21 04:32 UTCGHSA enrichment
  63. 2026-05-20 22:37 UTCEPSS rescore
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  72. 2026-05-18 21:31 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-54770?
CVE-2025-54770 is a medium vulnerability published on November 18, 2025. A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the netsetvlan command is not properly unregistered when the network module is unloaded from memory. An attacker who…
When was CVE-2025-54770 disclosed?
CVE-2025-54770 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-2025-54770 actively exploited?
CVE-2025-54770 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-54770?
CVE-2025-54770 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2025-54770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-54770, 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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