u-boot — security advisory
There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a `wLength` greater than 4096 bytes, they can write beyond the heap-allocated request buffer.
- Products
- u-boot
- Affected versions
- Not specified
- Fixed versions
- 2023.01~rc4+dfsg-2
- CVEs
- CVE-2022-2347
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:35 UTC · Revision 1
Source evidence
There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a `wLength` greater than 4096 bytes, they can write beyond the heap-allocated request buffer.
osv:DEBIAN-CVE-2022-2347
u-boot
Fixed versions: 2023.01~rc4+dfsg-2
u-boot
Fixed versions: 2023.01~rc4+dfsg-2
u-boot
Fixed versions: 2023.01~rc4+dfsg-2
Complete source record
{
"id": "153b94df074b7337db3656f325f441c00ca51e74fafb42494224d8a5797622ca",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-2347",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-2347",
"summary": "There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a `wLength` greater than 4096 bytes, they can write beyond the heap-allocated request buffer.",
"evidence": "osv:DEBIAN-CVE-2022-2347",
"products": [
{
"name": {
"value": "u-boot",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2023.01~rc4+dfsg-2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "u-boot",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2023.01~rc4+dfsg-2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "u-boot",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2023.01~rc4+dfsg-2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2022-2347",
"aliases": [
"DEBIAN-CVE-2022-2347"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2023.01~rc4+dfsg-2"
}
]
}
],
"package": {
"name": "u-boot",
"purl": "pkg:deb/debian/u-boot?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-2347.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2023.01~rc4+dfsg-2"
}
]
}
],
"package": {
"name": "u-boot",
"purl": "pkg:deb/debian/u-boot?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-2347.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2023.01~rc4+dfsg-2"
}
]
}
],
"package": {
"name": "u-boot",
"purl": "pkg:deb/debian/u-boot?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-2347.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:00:46.646003563Z",
"provider": "osv",
"upstream": [
"CVE-2022-2347"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-2347"
]
},
"related_cves": [
{
"value": "CVE-2022-2347",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 322642,
"published_at": "2022-09-23T13:15:10.133+00:00"
}