ALPINE-CVE-2026-56114
dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_makemessage() in src/dhcp6.c that allows unauthenticated same-link attackers to write beyond a fixed local buffer by serializing an oversized RFC6603 OPTION_PD_EXCLUDE option body. Attackers can send a crafted DHCPv6 ADVERTISE message containing an IA_PD IAPREFIX /0 with a valid OPTION_PD_EXCLUDE using an exclude prefix length of /121 through /128 to trigger the out-of-bounds write and potentially corrupt adjacent stack memory.
ALPINE-CVE-2026-56114
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:ALPINE-CVE-2026-56114
dhcpcd
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 10.5.2-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
dhcpcd
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 10.5.2-r0
Source reference:
/affected/1/ranges - 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"
},
{
"fixed": "10.5.2-r0"
}
]
}
],
"package": {
"name": "dhcpcd",
"purl": "pkg:apk/alpine/dhcpcd?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-56114.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.5.2-r0"
}
]
}
],
"package": {
"name": "dhcpcd",
"purl": "pkg:apk/alpine/dhcpcd?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-56114.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54541 · Revision 1
- Added to Heist Feed
- Publisher date