1 files changed, 1 insertions, 1 deletions
diff --git a/src/dhcp-manager/systemd-dhcp/src/libsystemd-network/dhcp6-option.c b/src/dhcp-manager/systemd-dhcp/src/libsystemd-network/dhcp6-option.c
index 3d6e24623a..40f77888a2 100644
--- a/src/dhcp-manager/systemd-dhcp/src/libsystemd-network/dhcp6-option.c
+++ b/src/dhcp-manager/systemd-dhcp/src/libsystemd-network/dhcp6-option.c
@@ -104,7 +104,7 @@ int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, DHCP6IA *ia) {
                 return -EINVAL;
         }
 
-        if (*buflen < len)
+        if (*buflen < offsetof(DHCP6Option, data) + len)
                 return -ENOBUFS;
 
         ia_hdr = *buf;