MediumFix available
dhcp — security advisory
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
- Products
- dhcp
- Affected versions
- Not specified
- Fixed versions
- 4.4.3_p1-r0
- CVEs
- CVE-2022-2928
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:11 UTC · Revision 1
Source evidence
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
osv:ALPINE-CVE-2022-2928
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
dhcp
Fixed versions: 4.4.3_p1-r0
Complete source record
{
"id": "11ca256a7857e3dc733157d44042be514c99d65d40f8d7957fb0e0987232a08c",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2022-2928",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2022-2928",
"summary": "In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.",
"evidence": "osv:ALPINE-CVE-2022-2928",
"products": [
{
"name": {
"value": "dhcp",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dhcp",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.4.3_p1-r0",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2022-2928",
"aliases": [
"ALPINE-CVE-2022-2928"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.13"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.14"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.15"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.16"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.18"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.19"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.3_p1-r0"
}
]
}
],
"package": {
"name": "dhcp",
"purl": "pkg:apk/alpine/dhcp?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-2928.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-15T07:17:54.206091483Z",
"provider": "osv",
"upstream": [
"CVE-2022-2928"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-2928"
]
},
"related_cves": [
{
"value": "CVE-2022-2928",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 321830,
"published_at": "2022-10-07T05:15:08.677+00:00"
}