DEBIAN-CVE-2026-6862
A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node's Length field is at least 4 bytes, which is the minimum size for an EFI (Extensible Firmware Interface) device path node header. A local user could exploit this vulnerability by providing a specially crafted device path node. This can lead to infinite recursion, causing stack exhaustion and a process crash, resulting in a denial of service (DoS).
DEBIAN-CVE-2026-6862
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-6862
efivar
Source reference: /affected/0/package/name
- Affected versions
- 37-6
Source reference:
/affected/0/versions38-1Source reference:
/affected/0/versions38-2Source reference:
/affected/0/versions38-3Source reference:
/affected/0/versions38-3.1Source reference:
/affected/0/versions38-3.1~exp1Source reference:
/affected/0/versions39-1Source reference:
/affected/0/versions39-2Source reference:
/affected/0/versions39-2~bpo13+1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
efivar
Source reference: /affected/1/package/name
- Affected versions
- 38-3.1
Source reference:
/affected/1/versions39-1Source reference:
/affected/1/versions39-2Source reference:
/affected/1/versions39-2~bpo13+1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
efivar
Source reference: /affected/2/package/name
- Affected versions
- 38-3.1
Source reference:
/affected/2/versions39-1Source reference:
/affected/2/versions39-2Source reference:
/affected/2/versions39-2~bpo13+1Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "efivar",
"purl": "pkg:deb/debian/efivar?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"37-6",
"38-1",
"38-2",
"38-3",
"38-3.1",
"38-3.1~exp1",
"39-1",
"39-2",
"39-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6862.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "efivar",
"purl": "pkg:deb/debian/efivar?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"38-3.1",
"39-1",
"39-2",
"39-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6862.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "efivar",
"purl": "pkg:deb/debian/efivar?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"38-3.1",
"39-1",
"39-2",
"39-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6862.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58464 · Revision 1
- Added to Heist Feed
- Publisher date