HighFix available
dhcp — security advisory
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
- Products
- dhcp
- Affected versions
- Not specified
- Fixed versions
- 4.4.1-r0
- CVEs
- CVE-2018-5732
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:00 UTC · Revision 1
Source evidence
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
osv:ALPINE-CVE-2018-5732
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
dhcp
Fixed versions: 4.4.1-r0
Complete source record
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"url": "https://osv.dev/vulnerability/ALPINE-CVE-2018-5732",
"method": "structured",
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"title": "ALPINE-CVE-2018-5732",
"summary": "Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0",
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}
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],
"modified": "2026-10-23T17:17:55.275147763Z",
"provider": "osv",
"upstream": [
"CVE-2018-5732"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2018-5732"
]
},
"related_cves": [
{
"value": "CVE-2018-5732",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415202,
"published_at": "2019-10-09T16:15:13.407+00:00"
}