Medium
dislocker — security advisory
Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.
- Products
- dislocker
- Affected versions
- 0.6.1-7, 0.7.1-3, 0.7.1-3build1, 0.7.1-3build2, 0.7.1-3build3, 0.7.1-4build1, 0.7.1-5, 0.7.3+git20240607-3build1, 0.7.3+git20250907-1, 0.7.3-2, 0.7.3-2.1ubuntu2, 0.7.3-2ubuntu1, 0.7.3-2ubuntu2, 0.7.3-3, 0.7.3-3.1, 0.7.3-3.1build1, 0.7.3-3.1build2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-107635
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:58 UTC · Revision 1
Source evidence
Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.
osv:UBUNTU-CVE-2026-107635
dislocker
Fixed versions: Not specified
dislocker
Fixed versions: Not specified
dislocker
Fixed versions: Not specified
dislocker
Fixed versions: Not specified
dislocker
Fixed versions: Not specified
dislocker
Fixed versions: Not specified
Complete source record
{
"id": "358943ced5c43fc63cc3dec9bf78ee445c01786b304e4eb3e6d79af020d09377",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-107635",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-107635",
"summary": "Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.",
"evidence": "osv:UBUNTU-CVE-2026-107635",
"products": [
{
"name": {
"value": "dislocker",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.6.1-7",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.1-3build1",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.1-3build2",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.1-3build3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "dislocker",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.1-4build1",
"evidence": "/affected/1/versions"
},
{
"value": "0.7.1-5",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "dislocker",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "0.7.3-2ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "0.7.3-2ubuntu2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "dislocker",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.3-2.1ubuntu2",
"evidence": "/affected/3/versions"
},
{
"value": "0.7.3-3",
"evidence": "/affected/3/versions"
},
{
"value": "0.7.3-3.1",
"evidence": "/affected/3/versions"
},
{
"value": "0.7.3-3.1build1",
"evidence": "/affected/3/versions"
},
{
"value": "0.7.3-3.1build2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "dislocker",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.3+git20250907-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "dislocker",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.3+git20240607-3build1",
"evidence": "/affected/5/versions"
},
{
"value": "0.7.3+git20250907-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-107635",
"aliases": [
"UBUNTU-CVE-2026-107635"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.6.1-7",
"0.7.1-3",
"0.7.1-3build1",
"0.7.1-3build2",
"0.7.1-3build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.1-3build3"
},
{
"binary_name": "libdislocker0.7",
"binary_version": "0.7.1-3build3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.7.1-4build1",
"0.7.1-5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.1-5"
},
{
"binary_name": "libdislocker0.7",
"binary_version": "0.7.1-5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.7.3-2",
"0.7.3-2ubuntu1",
"0.7.3-2ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.3-2ubuntu2"
},
{
"binary_name": "libdislocker0.7",
"binary_version": "0.7.3-2ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.7.3-2.1ubuntu2",
"0.7.3-3",
"0.7.3-3.1",
"0.7.3-3.1build1",
"0.7.3-3.1build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.3-3.1build2"
},
{
"binary_name": "libdislocker0.7t64",
"binary_version": "0.7.3-3.1build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
"introduced": "0"
}
]
}
],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.7.3+git20250907-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.3+git20250907-1"
},
{
"binary_name": "libdislocker0.7t64",
"binary_version": "0.7.3+git20250907-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
"introduced": "0"
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],
"package": {
"name": "dislocker",
"purl": "pkg:deb/ubuntu/dislocker?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.7.3+git20240607-3build1",
"0.7.3+git20250907-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107635.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dislocker",
"binary_version": "0.7.3+git20250907-1"
},
{
"binary_name": "libdislocker0.7t64",
"binary_version": "0.7.3+git20250907-1"
}
]
}
}
],
"modified": "2026-10-22T10:30:04.971626640Z",
"provider": "osv",
"upstream": [
"CVE-2026-107635"
],
"references": [
"https://ubuntu.com/security/CVE-2026-107635",
"https://www.cve.org/CVERecord?id=CVE-2026-107635",
"https://github.com/Aorimn/dislocker",
"https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/fvek.c#L90-L105",
"https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/vmk.c#L146-L180",
"https://github.com/Aorimn/dislocker/commit/0706462db88efe8df88150e4c3e4332b808f4581",
"https://www.vulncheck.com/advisories/dislocker-through-0.7.3-out-of-bounds-heap-read-via-vmk-fvek-datum-size-underflow"
]
},
"related_cves": [
{
"value": "CVE-2026-107635",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 405365,
"published_at": "2026-10-08T15:17:00+00:00"
}