MediumFix available
edk2 — security advisory
An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.
- Products
- edk2
- Affected versions
- 2022.11-6
- Fixed versions
- 2022.11-6+deb12u1, 2023.11-7
- CVEs
- CVE-2023-48733
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 16:26 UTC · Revision 1
Source evidence
An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.
osv:DEBIAN-CVE-2023-48733
edk2
Fixed versions: 2022.11-6+deb12u1
edk2
Fixed versions: 2023.11-7
edk2
Fixed versions: 2023.11-7
Complete source record
{
"id": "d22675c8f8e131ec181cbd2480dcb9b6699bd6c09125b6d310d46e610a71e803",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-48733",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-48733",
"summary": "An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.",
"evidence": "osv:DEBIAN-CVE-2023-48733",
"products": [
{
"name": {
"value": "edk2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2022.11-6+deb12u1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "2022.11-6",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "edk2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2023.11-7",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "edk2",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2023.11-7",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2023-48733",
"aliases": [
"DEBIAN-CVE-2023-48733"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2022.11-6+deb12u1"
}
]
}
],
"package": {
"name": "edk2",
"purl": "pkg:deb/debian/edk2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2022.11-6"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-48733.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2023.11-7"
}
]
}
],
"package": {
"name": "edk2",
"purl": "pkg:deb/debian/edk2?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-48733.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2023.11-7"
}
]
}
],
"package": {
"name": "edk2",
"purl": "pkg:deb/debian/edk2?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-48733.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:03:07.095063509Z",
"provider": "osv",
"upstream": [
"CVE-2023-48733"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-48733"
]
},
"related_cves": [
{
"value": "CVE-2023-48733",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 457703,
"published_at": "2024-02-14T22:15:47.32+00:00"
}