UBUNTU-CVE-2025-54770 (CVE-2025-54770)
Vulnerability from osv_ubuntu – Published: 2025-11-18 19:15 – Updated: 2026-05-20 15:22 – Source websiteA 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
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{
"binary_name": "grub-efi-arm64",
"binary_version": "2.14-2ubuntu1"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.14-2ubuntu1"
},
{
"binary_name": "grub-efi-arm64-unsigned",
"binary_version": "2.14-2ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "grub2-unsigned",
"purl": "pkg:deb/ubuntu/grub2-unsigned@2.14-2ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.14~git20250718.0e36779-1ubuntu4",
"2.14-2ubuntu1"
]
}
],
"aliases": [],
"details": "A vulnerability has been identified in the GRUB2 bootloader\u0027s 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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",
"id": "UBUNTU-CVE-2025-54770",
"modified": "2026-05-20T15:22:55Z",
"published": "2025-11-18T19:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-54770"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-54770"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-54770"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2025/11/18/4"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2025-54770"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.