This page tracks the Alpine Linux fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56114 →
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...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Alpine:v3.23
dhcpcd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.5.2-r0"}]}]
Alpine:v3.24
dhcpcd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.5.2-r0"}]}]
References
- advisory security.alpinelinux.org